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The heating system of any room is an important part of communications, the effectiveness of which depends on its competent assembly. The main element in it are batteries. Today, the plumbing market offers a huge selection of heating appliances. After traditional cast-iron radiators, bimetallic models are most in demand.
What it is?
The main design idea is to use two metal alloys with different technical and chemical characteristics. As a rule, the inner surface of the heater is made of stainless steel, since it has to constantly contact with the liquid heat carrier. Steel also has an anti-corrosion effect, moreover, it is resistant to pressure surges. The outer side is made of aluminum, which is characterized by a high heat transfer rate. Thanks to this combination of metals, the heating element has increased efficiency. Such models are most convenient for an apartment connected to a central heating system, since pressure surges are possible in it, and the use of low-quality coolant.
High-quality bimetallic heating batteries must comply with the requirements of GOST, which will allow them to be used without problems during the entire service life (about 25 years).
Device and principle of operation
The main elements of bimetallic heating batteries are two parts.
- The core is filled with coolant. Since it interacts with an aggressive environment, it is made of steel or copper. These metals are highly resistant to corrosion. As part of the internal element, two components can be distinguished, such as:
- collectors are made of steel. They are necessary for connecting radiators to the heating system. Stainless steel is able to withstand pressure surges, and copper is additionally resistant to electrochemical processes;
- heat-conducting steel channels.
- outer layer. For its production, aluminum is used as an excellent heat conductor. The aluminum case is able to quickly change its temperature, which makes it possible to regulate heat transfer. The general design consists of two horizontal steel pipes connected by vertical steel pipe jumpers, through which a heat-carrying liquid or steam is passed. This system is covered on top with aluminum fins or a monolithic body. The heat exchanger has a complex configuration due to convection ducts. Sections are connected by spot welding during production. During installation, structural parts are mounted using rubber gaskets or nipples made of steel.
Radiator operation is based on the physical phenomena of convection and radiation.
The principle is as follows:
- the heat-carrying liquid is heated to a high temperature in boilers and transferred centrally through pipes. Thus, the coolant enters the heating batteries;
- the steel core, interacting with the heated liquid, transfers thermal energy to the aluminum case, which in turn heats the room.
In some cases, when connecting bimetallic batteries to a centralized heating network, a problem arises - the first two or three sections from the tap heat up, and the ones following them remain slightly warm or completely cold. Experienced specialists first of all check radiators for airing. Air may have entered during installation.
If this is not the problem, then the following methods should be used:
- connect the radiator diagonally;
- use a flow extender that increases the efficiency of heat transfer.
It should be noted that the second option is only suitable for radiators that are connected to the heating system using stop valves with an American. In addition, experts note that flow extensions are not easy to buy in stores, so it is better to use various manuals and instructions for making such a part with your own hands.
The instruction looks like this:
- for work, you need a piece of copper pipe with an outer diameter of 18 mm. The wall thickness must be at least 1 mm. In addition, you will need a solder coupling, silicone gaskets, solder, a gas burner, as well as a set of tools that will allow you to cut off the desired piece of pipe and clean the metal after cutting;
- before starting work, turn off the tap and drain the coolant fluid;
- remove the radiator from the brackets, since it is more convenient to carry out installation work on a flat floor surface;
- check the condition of the silicone gasket. If there is damage, it is better to replace it;
- the required length is cut from the copper pipe using a pipe cutter. To obtain an even cut, experts advise placing it strictly perpendicular to the tool;
- the edges are bevelled and cleaned with a stiff brush. In no case should you use sandpaper, since then it will be extremely difficult to solder copper parts;
- further, the process of soldering the sleeve with the pipe is carried out, for which flux is applied to them with a brush, which must be done carefully, in an even thin layer. If you overdo it, then frozen drops of flux will cause a booming sound when the coolant circulates inside the radiator. The prepared parts are inserted into each other and heated with a burner. As soon as the flux has acquired a silver tint, solder is applied to the joint. Due to the high temperature of the pipe, it will spread on its own and fill all the voids. If the flux began to curl into drops, the process should be stopped;
- pipes should be pressed against each other for 1–2 minutes until completely cooled;
- length adjustment is made depending on the water supply;
- the resulting extension is inserted inside the battery in the opposite direction to facilitate the movement of the coolant in the radiator with side connection;
- the battery is returned to its place and connected to the central heating system;
- if necessary, excess air is removed.
When installing a flow extension, it should be borne in mind that it is used in the case of a large number of sections of a bimetallic radiator.
Main types
The classification of radiators depends on various parameters and factors.
By type of material
For the manufacture of heating batteries use various materials.
- Cast iron. Cast iron models appeared in the 19th century. The material is characterized by low inertia. This means that it heats up slowly, so it will take some time for the room to warm up. However, cast iron also cools slowly, therefore, heat is retained for a long time, providing a comfortable microclimate. The material is quite strong and durable, it does not corrode and is cheap. The impressive weight is the most significant drawback of cast iron radiators.
- Steel. The thermal conductivity of this material is similar to cast iron. Since the wall thickness is less than that of cast iron counterparts, the steel heats up faster. High inertia allows the use of thermostats in the design of heating products. Steel parts allow you to diversify the design of radiators. A significant disadvantage is the low resistance to corrosion, which reduces the service life.
- Aluminum. For the manufacture of sections, an aluminum alloy with a silicon additive is used. The metal is very light, so the weight of the batteries is small. Aluminum has a high degree of thermal conductivity and an excellent heat transfer coefficient. Aluminum batteries have all the advantages of this material, including good inertia, which allows you to control the temperature. A significant disadvantage is the softness of aluminum, so the radiators are characterized by low resistance to physical impact and a weak threaded connection. And also aluminum heating products depend on the quality of the coolant, its acidity.
- Bimetal. The radiator is made of two types of materials: copper or steel as the core and aluminum for the body.
By type of construction
There are two types of bimetallic radiators depending on the type of construction.
- Sectional models are a prefabricated structure consisting of several sections. Such models allow you to choose the power by changing the number of individual sections. Various seals are used for connection. The main negative factor is the presence of joints, which increase the risk of leaks. And also the joints are exposed to a coolant with high chemical activity, for example, antifreeze.
- Monolithic radiators are more stable and reliable. Their technical characteristics are higher than sectional analogues. Due to the lack of joints, heating devices can withstand heavy loads.
If we compare the performance of these two types of bimetallic radiators, we get the following result:
- the operational life of monolithic models reaches 50 years, while for sectional models it is a maximum of 25 years;
- operating pressure in the heating system for the second type is allowed within 100 atmospheres, for the first - up to 35 atmospheres;
- thermal power of one section in both options - from 100 to 200 W;
- the cost of monolithic options is higher;
- for modifications with a solid core, it is impossible to change the technical parameters, for sectional ones - there is such an opportunity.
By location
Depending on the location of the battery, it is worth highlighting several types.
- Horizontal Batteries- This is the default option. They are installed most often. Such models have a huge range. The changing parameters are: dimensions, performance and design. To attract consumers, manufacturers pay attention not only to the technical component of the bimetallic radiator, but also develop unique design lines. Now on the market are colored, textured, combined options using different design techniques.
- vertical radiator. Houses with high ceilings and large rooms need more radiator space. It is vertical models that are designed to cope with this task, since in the case of horizontal options they will have to encircle the entire room along the perimeter. Such modifications will help solve the heating problem if there is no space under the window, for example, windows start right from the floor. They can be installed in inter-door and inter-window partitions, which will save usable space in the room without losing the functionality of the batteries. Bimetallic vertical radiators not only heat, but also serve as a unique piece of furniture. The simplest option in the form of chrome-plated stainless steel wall pipes is used in modern styles with an industrial twist.
- Embedded model. Radiators of this type appeared due to new technological possibilities. They are a win-win option in cases where conventional batteries are impossible or difficult to install. For example, in a room with a large glazing area, experts offer bimetallic radiators built into the floor. For their installation, special channels are made in the floor, and on top they are covered with a special protective grill made of wood or metal.
Underground models are of two types.
- Case. In this case, the heating structure is built into a special box, which plays the role of a channel. The body is made of a thin sheet of galvanized metal and covered with thermal insulation. The dimensions of the produced case models of bimetallic radiators are as follows: width is 5-25 cm, height - 10-70 cm, length - from half a meter to several meters. Powerful models are additionally supplied with fans powered by electricity.
- Frameless. In order to mount these models in the floor, you must first build a box yourself, since it is not included in the kit. As a rule, the channel is made rectangular, its size should be 10 cm larger than the size of the radiator in order to ensure natural air circulation.
There are also built-in modular structures for walls and other openings. If you install such a model in a partition between rooms, then it can heat two rooms at once at the same time. Some designers embed bimetal convectors in furniture.
Specifications
All bimetallic radiators have a number of important technical characteristics that you need to know before installing them.
All parameters are specified in the technical documentation for the product.
- The most important among them is the ability to withstand high pressure inside the heating circuit. It should be understood that this indicator should have a margin of safety, since hydraulic shocks sometimes occur in the central system, at which the pressure becomes sharply higher than the working one. High-quality bimetallic heating batteries must withstand 40 atmospheres or more.
- Heat transfer is characterized by such an indicator as the heat output of the radiator. It is measured in W and kW (watts and kilowatts). This indicator depends on the number of sections and may vary, therefore, the power of one section is indicated in the technical data sheet. One section of a bimetallic radiator can have heat dissipation from 100 to 185 watts. The calculation of power for space heating is carried out on the basis of SNiP, which contains a table of heat transfer. For example, for an area of 1 square meter and a ceiling height of up to 2.7 meters, the calculated thermal power will be 100 watts.
- Another important indicator is the volume of the coolant. The smaller it is, the better. For bimetallic analogues, it is 0.16–0.18 liters per section. For comparison, in aluminum, it varies from 0.25 to 0.46 liters.
- Resistance to chemical components of the coolant. The degree of acidity and slagging of the working fluid is important here. For steel and aluminum cores, this coefficient is approximately the same. Copper is chemically more stable. As for abrasive particles and suspensions that are present in the coolant, it is desirable that they be as small as possible. Since the walls of the metal cores are thin, they are susceptible to abrasion, in addition, contamination clogs the pipes. The ideal option for installing bimetallic radiators is your own heating system, but you can also choose a good option with a centralized connection.
- The service life is guaranteed by each company itself, but on average for bimetallic analogues it is 25 years.
- Overall parameters depend only on the manufacturer.
- Depending on the model and dimensions, the weight of the entire product also varies.
Advantages and disadvantages
If we consider the advantages of bimetallic radiators, then it is worth highlighting the following:
- high heat transfer coefficient;
- the possibility of installing a thermostat, which allows you to independently regulate the temperature and volume of the coolant. This property contributes to the economical use of heat energy and, accordingly, reduces financial costs;
- sectional design. The number of sections can be selected depending on the area of the heated room. In addition, it allows you to repair or change sections independently of each other;
- reliability. Radiators withstand pressure surges up to 37 atmospheres. Due to corrosion resistance, bimetallic batteries do not fail even with increased acidity of the coolant;
- possibility of installation in any heating systems.
- durability. Service life within 20–25 years;
- streamlined shape improves safety;
- the panels do not heat up to a “dangerous” temperature, so they are fearlessly installed in children's rooms and hospital wards;
- a large assortment. For example, there are models without hanging on brackets. They can be installed vertically using additional stiffeners;
- wide size range;
- wide range of colors. There is a possibility of independent coloring of sections;
- light weight compared to cast iron counterparts;
- simple installation that does not require a lot of time;
- easy care.
Like any product, bimetallic radiators have their drawbacks, namely:
- the difference between the coefficients of expansion of aluminum and steel. This is the main drawback of such models, which causes the panels to creak during long-term operation, reduces the strength of the structure;
- poor quality of the coolant reduces the battery life;
- the cost of radiators of this series is higher than other analogues.
Comparison with other types of batteries
When choosing a heating radiator, buyers first of all pay attention to the material from which they are made. Many technical parameters depend on this, and this is the difference between the models.
Cast iron
This is a classic version of the heater, which has been used for a long time. Many believe that he has no alternative in terms of strength and durability. The temperature of the heat-carrying liquid can be up to +150 degrees, the permitted working pressure is 15 atmospheres. The area of use is extensive: from public to residential premises, technical buildings and workshops. The possible thermal power of the section reaches 160 W.
The biggest advantage of cast iron radiators is their low cost. In addition, they are characterized by resistance to any type of coolant and ease of installation work during installation. Thick walls perfectly resist abrasives in the working fluid. If the system is characterized by severe contamination, then it is better not to find cast-iron models. A small degree of inertia does not allow you to adjust the heat transfer, unlike other analogues.
The principle of operation is based on the radiation of thermal energy, and not on convection. The latter warms up the air and makes it drier, in the case of radiation, the objects themselves heat up. The disadvantages include the significant weight of the product. Many note the nondescript appearance as a minus, but this is a moot point.
Since manufacturers offer cast-iron radiators of exquisite shapes, decorated with forging, however, their cost increases significantly.
Steel
Radiators made of steel are produced immediately in finished form. They are designed for low pressure up to 10 atmospheres and are very sensitive to corrosion. Since the steel surface heats up quickly, the heat transfer rate is good. Thermal power can reach 5700W. In the case of a low coolant temperature in the heating circuit, steel modifications are the best fit.
They are quite suitable for heating small rooms. Unfortunately, the service life of such radiators is the shortest. Experts do not advise connecting them to central heating systems, since they do not have a margin of safety, they can break through with a pressure surge. And they are also afraid of coolants in which there is a large amount of suspension, which leads to blockage of the channels. The most successful option for installing radiators of this design is an autonomous heating system with a gas or electric boiler.
Aluminum
Aluminum batteries have collected all the advantages of steel models: aesthetics, low weight and high heat transfer coefficient. Unlike cast iron modifications, aluminum ones allow you to install thermostats. The main disadvantage is the weak threaded connections. Also, aluminum is subject to corrosion in the presence of a high degree of acidity of the carrier liquid. In a private heating system, you can choose this type of coolant to reduce this effect and increase the service life. This condition is not feasible in a centralized circuit, so the use of aluminum radiators is inefficient.
Bimetallic
In most cases, this option wins out among many. Bimetal heating radiators are a product of the use of new technologies in the energy field. They successfully combine the advantages of steel and aluminum products. The steel core allows stronger connections and better resists corrosion. Manufacturers offer options with a copper circuit, which has a higher anti-corrosion effect.
Aluminum body for increased heat dissipation, since the material is characterized by excellent thermal conductivity. The only negative is a certain dependence on the degree of acidity of the coolant and the level of its contamination. And also the high cost of the product. In technical rooms and workshops where it is necessary to heat large areas at low cost and low quality of the carrier fluid, experts still recommend installing cast-iron radiators.
Making a general conclusion, it can be noted that modern analogues of heating batteries win in their form. They are thinner, ergonomic, without sharp corners, with a beautiful design. They are characterized by precise geometric lines and shapes, unlike cast iron ones, so it is more convenient and easier to join sections. A high degree of inertia allows installing thermostatic regulators and control sensors on metal counterparts, and supplying them with other technical innovations. Installation work has also become easier and faster.
However, they also have disadvantages that cast-iron representatives of radiators do not have. These include durability. Cast iron is more wear-resistant than any steel counterparts. Bimetallic and aluminum batteries are sensitive to contaminated coolants, cast iron ones tolerate them absolutely calmly. The acidity of the carrier fluid is important for the former and not for the latter. In terms of resistance to water hammer, cast-iron radiators have no equal among all representatives of heating devices. Based on the foregoing, the choice must be approached very carefully and carefully, especially with a centralized heating system.
Popular manufacturers and reviews
There are few manufacturers on the market of bimetallic radiators whose products have a unique property of matching price and quality. Compiling a rating based on consumer reviews, these include several Russian brands and Italian firms.
Italy
Global and Sira are the best known companies in the domestic market. Their bimetallic batteries look aesthetically pleasing. The coating is often made in white, milky and cream tones. The line includes adjustable modifications with a thermostat, as well as with an air vent. The range includes models with different installation methods, different configurations and sizes. Firms guarantee high reliability of products.
- Global. Italian products successfully withstand the harsh Russian climate. The core of the radiator is endowed with high anti-corrosion protection. The battery is able to withstand pressure up to 50 atmospheres. With all the technical advantages, radiator systems have an excellent appearance and a high heat transfer coefficient. The design consists of high-quality parts, all connections are made using sealed gaskets. Compact and democratic design allows you to fit a bimetallic radiator into any interior. The tests carried out make it possible to guarantee a service life of up to 20 years.
- Sira. In addition to excellent technical indicators, such as lightness and practicality, fast heating and high heat transfer coefficient, strength, corrosion resistance, the radiators of this Italian brand have a graceful curved shape without sharp corners. The maximum allowable pressure can reach 170 atmospheres. The only drawback is the high price of products, but it is incomparable with absolute comfort and reliability in operation.
Russia
One of the well-known Russian manufacturers is Rifar. The production line is located in the city of Guy, Orenburg region. Products are manufactured using modern technology, new technologies and innovative materials. In particular, Italian-made melting furnaces and robotic lines for applying powder paint are used. The maximum permissible performance characteristics of the manufactured bimetallic radiators reach 135 degrees for the temperature range of the coolant and pressure in the system up to 20 atmospheres. Standard models have from 4 to 12 sections. By individual order, they are increased to 24 or reduced to two.
Rifar offers different series of radiators that differ in appearance and technical characteristics. However, without exception, all models have high heat dissipation, which is achieved with the help of an aluminum case made of flat fins.
- Rifar Base- This is the most popular one produced. It is represented by three options with different distances between the axles: 500, 350 and 200 mm. The first type is more powerful in the series and is used to heat cold, poorly insulated rooms. Base 200 is characterized by a closed back surface. For installation, an upper and lower connection to the heating system is provided.
- Rifar Monolith. This series is designed for use in heating systems with increased pressure up to 100 atmospheres. The design is patented by the company as fundamentally new. Its uniqueness lies in the presence of a non-separable steel multi-channel core. Solidity ensures reliability and no leaks.
The general specifications of this series are as follows:
- 25 year warranty;
- high anti-corrosion protection of channels;
- lack of joints between sections;
- the ability to use non-freezing liquids as a coolant;
- maximum allowable temperature of the working fluid +135 degrees;
- nominal pressure up to 100 atmospheres;
- simple installation. All connecting parts are standard;
- maximum safety allows you to install bimetallic radiators in children's and medical institutions.
The manufacturer offers the following models in this series: Rifar Monolit 500 and Rifar Monolit 350. The number of sections in each of them varies from 4 to 16. Models with 4 and 6 sections are most in demand.
- Rifar Flex. Radiators of this series differ in the refined design. They can be given a curved shape while maintaining performance. The warranty period for such modifications is up to 10 years.
- Rifar Forza. These radiators are the most powerful among bimetallic batteries and are used for heating large rooms. The manufacturer gives a guarantee for these models up to 15 years.
The Russian brand "Isotherm" produces copper-aluminum convectors of interesting design. An excellent solution is a removable steel polished casing. The range includes wall and floor modifications. Their main difference is the presence of a back wall, because wall-mounted ones do not have it. It is worth considering in more detail the most popular series.
- Atoll and Atoll Pro have a copper-aluminum construction, which is hidden by a removable housing made of galvanized powder-coated steel. The design of its surface was developed by leading domestic specialists. Any color scale, any drawing is possible. At the same time, the technical characteristics do not suffer: the nominal pressure is 16 atmospheres, the temperature is up to +130 degrees, the power varies from 243 to 11174 watts. Only water or antifreeze compatible with copper is possible as a heat transfer medium.
- Rodos differs from the first modifications in the material from which the body is made. This is polished stainless steel. A mirrored metal surface will be an excellent design find for modern interior styles, such as high-tech.
Piligrim is another brand of domestic production. Products are characterized by increased resistance to corrosion due to the use of copper cores instead of steel.
Other countries
There are manufacturers from other countries on the market of bimetallic radiators. Mars is a South Korean company. The products of this brand produce models with a copper core. Technical indicators are adapted to work in Russian heating systems. They are characterized by high wear resistance, efficiency and economy. The copper collector allows to exclude corrosive reactions for a long time.
As for the design, there is not much variety here. Manufacturers developed similar models, based on the superiority of essence over form, to obtain a radiator of good power with compact dimensions. The design of bimetallic batteries with a copper core Mars is non-separable sectional. Each model consists of an odd number of sections from five to nineteen. On the one hand, solidity provides a more reliable design, reduces the risk of leaks, on the other hand, it also limits the possibility of increasing power by increasing sections.
The general specifications are as follows:
- operating pressure up to 20 atmospheres. The maximum possible limit is up to 30;
- the temperature range for the heat-carrying liquid is limited to +130 degrees;
- acidity of the coolant within Ph 7–9;
- standard sizes - 300 and 500 mm;
- section depth - 65 mm;
- weight, depending on the model, varies from 4 to 23 kg, which in principle is defined as small.
Models with a center distance of 300 mm are able to heat a room up to 19.5 square meters. Modifications 500 mm - area up to 34 sq. m. For city apartments connected to a central heating system, Mars products are quite a suitable option in terms of dimensional parameters and operating pressure. However, when choosing, it is imperative to find out all the chemical components of the heating circuit coolant: acidity and suspended matter content, since these characteristics may not be suitable.
The Polish brand Regulus-system also produces bimetallic batteries using copper. The company gives a guarantee on its products for up to 25 years, although performance is slightly lower than that of the South Korean brand. The production, founded in 1994, mainly produced convector-type radiators. After the reorganization in 2001, the organization expanded, modernized and continued to produce bimetallic radiators. Among the advantages of the company, it should be noted the high professionalism of the staff, multi-stage quality control of products, the latest equipment and technologies. An extensive logistics network allows us to offer customers favorable conditions. The company presents its products in the markets of Russia, Belarus, Ukraine, the Baltic States.
In addition to the basic configuration, it is possible to order an individual version of the angular or radial shape. Mounting is provided for wall, but it is possible to order floor legs. A characteristic feature of the bimetallic radiators of this company is the identity of both sides, so you can mount it from any.
The general technical parameters are as follows:
- working pressure should not exceed 15 atmospheres;
- coolant temperature - up to +110 degrees;
- thermal power, depending on the model, varies from 172 to 6000 watts.
The brand produces several series of bimetallic radiators.
- Regulus is the basic version with a rounded top panel and has a convection-radiative principle. Installation of lateral or bottom connection to system of heating is possible. Specifications are in the middle range. The price range makes this model the most popular of the entire product line of the company.
- Sollarius. It differs from the basic configuration only in shape, it is more square.
- Sollarius Dubel is the higher heat output option. Models from this series are characterized by a doubled depth: 180 mm instead of 90 mm. In addition, skirting modifications with a height of only 12 cm are presented in this series.
- Sollarius Decor is a vertical copper-aluminum radiator designed for rooms where there is no space for horizontal models. In addition, it can become an interesting design object in the interior. The complete set was supplemented by an air vent and a thermostat. Connection is only possible for the lower type.
- Sollarius S-Corner is a corner version that has gained popularity in rooms with adjacent exterior walls.
- Regulus Inside are models that are built into the wall. The manufacturer produces several types, including those with an internal fan. Radiators can be mounted in wall partitions, roofing or furniture niches. The design is modular, therefore, during installation, the quantity is assembled at the request of the customer.
- Regulus E-Vent has increased heat dissipation due to the built-in fan, which is connected to electricity. It can be turned off, and then the radiator operates normally.
The Ukrainian plant "Mayak" produces a series of copper-aluminum radiators and convectors "Termia". The design of radiators differs from analogues in that not only the core in the form of a pipe is made of copper, but also the plates attached to it. The structure is covered with an aluminum case covered with powder paint that has undergone a firing procedure. Models have two types of connection to the heating system: side or bottom. For the latter type, a thermostat is provided in the design. Batteries can be mounted using brackets or floor-mounted - with legs. The basic equipment of the product is supplemented with a manual air vent in the form of a Mayevsky crane.
The main technical characteristics of bimetallic radiators are as follows:
- dimensions: width is 90 mm, height - from 200 to 600 mm in increments of 100, length - from 400 to 2000 mm;
- operating power: 240–4240 W for batteries with side connection type, 270–4620 W for bottom connection type without thermostat;
- product weight varies from 1.6 to 15 kg;
- operating pressure in the heating system should not exceed 16 atmospheres;
- temperature of the heat-carrying liquid up to +30 degrees;
- the manufacturer guarantees that the radiators can work with any type of coolant: water, steam, various oils and antifreezes, the main thing is that they are designed for copper pipes.
The design of the convector heat exchanger consists of 4 copper pipes with a cross section of 15 mm, on which aluminum fins with dimensions of 10x10 cm are installed. The distance between the plates is 5.6 mm. Connection - only lateral.
Technical parameters of copper-aluminum convectors are as follows:
- dimensions: depth is 125 mm, height - 450 mm, length varies from 400 to 2000 mm;
- the heat transfer of the convector, even at a temperature regime within +40 degrees, varies from 710 to 3510 W;
- construction weight - from 2 to 14 kg;
- operating pressure in the heating system within 10 atmospheres;
- manufacturer's warranty - 10 years.
Models from Chinese manufacturers are attractive due to their low price, interesting design and unique finish. However, as practice shows, reduced cost is achieved by using materials of lower quality, due to which the service life is significantly reduced.
Which option is better to choose?
When buying, you need to pay attention to quality certificates, which will save you from unpleasant surprises during use. You can not focus only on the cost of the goods, since often the low price is due to the low quality of the materials used. For example, bimetallic radiators made in China have a simplified design, which lowers the operating pressure threshold. When buying bimetallic modifications of radiators, one of the important criteria is the features of the heated room: dimensions, type of use (public, technical, residential). Depending on this, the model, installation method and power are selected. Variation is achieved by changing the number of sections, the presence of an automatic air vent.
First of all, it is necessary to determine the cross-section of pipes extending from the central heating system, which will affect the choice of nozzles. Next, you should ask about the pressure in the general heating circuit. The radiator model should be chosen with a margin of safety so that the radiator can withstand possible surges. Old-type apartment buildings are characterized by pressure in the range of 5–8 atmospheres, while for modern high-rise buildings this figure is higher - 12–15 atm. It is better if the buyer knows the composition of the coolant, so you can choose the most profitable option that will last a long time. After that, measurements are already made to determine the geometric parameters of the battery.
The optimal distances are as follows:
- from the window to the battery must be at least 10 cm;
- from the floor to the radiator - not less than 6 cm;
- if the battery is installed under the window, then its width is 50% of the window width.
When choosing a sectional option, it is important to correctly calculate the number of sections.
To do this, you must follow the following algorithm of actions:
- determine the area of the heated room;
- find out the power of the radiator. It can be found in the price lists or technical passport of the product;
- calculate the number of sections: K \u003d Px100 / M, where K is the number of sections, P is the area of \u200b\u200bthe room in square meters, M is the battery power expressed in watts. For example, if the area of the room is 25 square meters. m, and the radiator power is 180 W, then K \u003d 25x100 / 180 \u003d 13.89. So, you need to install 14 sections.
Experts note that multi-section models are less efficient, therefore it is more reliable to install several small-section batteries. In the proposed example, there are two five-section radiators and one four-section.
The specified calculation is adjusted depending on the number of window openings in the room:
- if the apartment is corner and there are two outer walls and two windows in it, then the calculation of sections is increased by 20%;
- if the windows in an ordinary room face north, then the calculation should be increased by 10%;
- if the choice is on a model built into the floor, then it must be remembered that their principle of operation is somewhat different from the wall-mounted version. The fact is that they will require a preliminary hydraulic calculation and setting the operating mode of the thermostats.
An important factor when choosing is the aesthetic perception of the radiator. As a rule, heating appliances occupy a prominent place in the room, so they are either hidden using various types of cases, or turned into an art object, or built into the wall. Many companies are seriously engaged in the design component of bimetallic radiators. It is necessary to take into account the tastes of consumers, without reducing the quality of products. However, it must be remembered that you will have to pay extra for an individual design.
Due to the fact that replacing heating batteries is a costly and troublesome undertaking, it is better to purchase bimetallic radiators from trusted manufacturers that guarantee a long service life of more than 20 years.
Verified licensed companies, in addition to a full package of documentation and guarantees, provide other services: consulting, calculation of the required parameters for a particular room, delivery and installation of radiators on site. When buying, you should check the integrity of the protective coating of the case. Scratches and dents will cause the aluminum to oxidize, a corrosive process will begin, and the appearance will be spoiled in a short time. The price when buying a high-quality bimetallic radiator starts from 400–500 rubles per section. Anything lower is most likely lower quality or fake. Inserts made of steel or copper in a bimetallic radiator must have a thickness no less than the wall thickness of the water pipe.
Bimetallic heating radiators are widely used in private houses and apartments. They are characterized by extremely long service life and endurance to high pressure. Installing such radiators in your apartment, you get at your disposal a reliable and durable source of heat and comfort. Which radiators are better and how to choose them? You will learn about this from our review.
Bimetal radiators - what is it
For many years, cast iron and steel radiators have been used in heating systems. They had certain advantages, but over time they were replaced by modern aluminum and bimetallic radiators with high efficiency. To date, the bimetallic models are the leader in terms of reliability. What are they?
Aluminum heating radiators are very sensitive to pressure in the system, and at high pressure they will inevitably burst.
Many people know about efficient and inexpensive aluminum batteries. Aluminum radiators are characterized by excellent heat dissipation, light weight and ease of installation. But they also have obvious disadvantages - this is the lack of resistance to corrosion, high pressure and water hammer. Aluminum deteriorates under the influence of aggressive coolants and bursts when the nominal pressure is exceeded. To solve the problem with the lack of resistant radiators, bimetallic radiators were created.
The basis of bimetallic radiators is strong steel - the core is made from it. On top of this steel core is an aluminum “shirt” responsible for heat transfer. The result is a kind of "sandwich" of two metals. Steel tolerates pressure surges and water hammer well, and under the influence of an aggressive coolant, it deteriorates rather weakly. This makes the battery very durable.
As for the aluminum "shirt", it does not come into contact with the coolant, so it is practically not threatened by anything. As a result, the developers managed to create lightweight, durable and extremely durable heating batteries. What are the advantages of bimetallic batteries?
The bimetal radiator consists of a strong steel core and an aluminum body.
- Long service life - resistant and durable steel is used in the production of radiators, which does not deteriorate under the influence of an aggressive coolant. As for aluminum, in a dry environment it is practically eternal;
- Resistance to high pressure and water hammer - the same steel core is responsible for this. Battery manufacturers claim that their radiators can easily withstand pressure surges up to 50-60 atmospheres. Also, models began to appear on the market that are resistant to pressure up to 100 atmospheres (for a short time);
- Long service life - it reaches up to 25 years. But practice shows that this indicator is not the limit;
- High heat transfer is the key to the efficiency of the heating system. Bimetal radiators have a heat output of up to 200 W per section. This is a very high figure, typical for steel and aluminum models - this is exactly what the developers were striving for when creating these batteries;
- Great appearance - bimetal batteries are extremely neat and compact. They are well suited for exposed and concealed (under-panel) mounting. They can be installed both in the apartment and in the office - they fit perfectly into any interiors;
- Lack of inertia - bimetal batteries heat up in a matter of minutes. This is due to the low heat capacity of the metals used;
- Repairability - if necessary, a failed section can be quickly replaced without changing the entire battery.
In this way, bimetallic heating batteries have absorbed only the best features of their predecessors. They have become indispensable when creating heating in multi-storey buildings, where there is a high pressure of the coolant. But they also have their drawbacks:
- High cost - the disadvantage is not very significant, since you have to pay for quality and reliability;
- Noisiness - this manifests itself over time and only on batteries of poor quality (when the manufacturer frankly “hacks”, saving on the production of radiators). As a result of thermal expansion, the batteries begin to emit extraneous sounds.
This list can be completed, since bimetallic batteries do not have any special drawbacks - only solid advantages.
Where are bimetallic batteries used?
A frequent consequence of water hammer in a heating system with low-quality or old radiators is battery rupture.
Heating of multi-storey buildings is carried out by centralized heating systems. They are characterized by low quality of the coolant, high pressure and the presence of water hammer. Many high-rise buildings still use steel radiators, which have good efficiency and high heat dissipation. But their appearance is far from perfect. Therefore, apartment owners in multi-storey buildings often change batteries to bimetallic ones.
Bimetal radiators tolerate high pressure well - some models can withstand up to 60 or even up to 100 atmospheres. That's why ideal for centralized heating systems. The resistance to water hammer that occurs in heating systems connected to central boiler rooms is also pleasing - other batteries literally burst, flooding apartments and personal belongings of residents.
Also, bimetallic batteries are used to heat large industrial, administrative and utility rooms connected to centralized boiler rooms. They are also installed in private households, but this is not very profitable - there is no high pressure in autonomous heating systems, so buying bimetal batteries will be a waste of money.
For heating private houses, it is more profitable to purchase aluminum radiators - they have a more affordable price and work well with a good quality coolant.
Characteristics of bimetallic radiators
Technical characteristics of bimetallic radiators of the Italian company Global
- Coolant temperature - up to + 110-130 degrees;
- Thermal power - up to 205 watts per section;
- The internal volume of one section is from 0.15 to 0.4 liters;
- Working pressure - from 16 to 35 atm;
- Peak pressure - 50-100 atm;
- Section weight - 1.5-2 kg;
- Center distance - 350 or 500 mm.
Naturally, the characteristics may differ in one direction or another, depending on the manufacturer.
You can get more detailed information about the technical characteristics of the selected bimetallic radiator from the product data sheet.
Which bimetallic radiators are better
When choosing equipment for the installation of a heating system, it is necessary to pay attention to radiators. They must be reliable, durable and of high quality. Bimetallic heating radiators - which are better and how to choose them? Focus on the following options:
- Heat dissipation of one section;
- Producing country;
- Trademark.
These are key parameters, so you need to pay special attention to them so as not to buy some short-lived nonsense. The price for one section of bimetallic radiators varies from 550 to 1000 rubles. Naturally, there are also more expensive models in stores. If the selected radiator turns out to be suspiciously cheap, it is better to refuse to buy it. The optimal price tag for today is 600-700 rubles per section.
Heat dissipation selection
For more efficient heating of the room, use radiators with greater heat dissipation.
The higher the heat transfer, the warmer it will be in the rooms - the simplest laws of physics work here. Cast iron batteries have low heat dissipation, so they cannot release much heat into the atmosphere. If the temperature in the rooms seems low to you, try replacing old cast-iron batteries with modern bimetallic ones. Due to the high heat dissipation, you will feel how the rooms become much warmer.
The range of thermal power of bimetallic radiators is quite large - from 130 to 205 W per section. The greater the thermal power (heat transfer), the warmer in the rooms with the same number of sections. We recommend choosing batteries with maximum heat output, because the heating system should not only be beautiful, but also compact - with powerful batteries you can reduce the number of sections. But you need to remember that you have to pay for high heat dissipation, so such batteries are more expensive than their low-power counterparts.
If we do not take into account the most advanced and efficient bimetallic batteries, then the average thermal power will be about 170-180 W per section.
Selection by country of origin
When choosing the best bimetallic heating batteries, you need to pay attention to the country of origin. Italy is the leader in quality here. If you saw Italian batteries in the store, you can safely count on their highest quality. Only German products can compare with Italian products - many well-known and little-known manufacturers work in Germany. As for domestic manufacturers, they work under licenses of foreign brands, so their quality can be trusted.
Italian bimetal radiators GLOBAL Style Plus
Nothing unequivocal can be said about Chinese manufacturers - that's why they are Chinese manufacturers. They do some things well, and some things they do badly. One batch of batteries can drastically differ in quality from another. Somewhere they can save on the thickness of the metal, forgetting to correct the technical specifications. And someone makes quite decent batteries, albeit somewhat inferior in quality to European products. That's why buying Chinese heating batteries is always associated with a certain risk.
For our part, we recommend buying bimetallic batteries from well-known manufacturers from Italy, Germany and Russia. However, if you come across radiators from the well-known Chinese manufacturer Grandini, then you can think about buying them - they are quite good in quality.
Select by manufacturer
Which bimetallic batteries are better and which are worse? You can answer this way - if you buy batteries from the Italian brand Global, then you will not be mistaken in your choice. This manufacturer produces a wide range of radiators, including bimetallic ones. The Style Plus 500 series has the highest heat dissipation. The numerical index here indicates the center distance, and the heat dissipation index reaches 185 W per section. Other series are also on sale, which are distinguished by a more affordable cost.
One of the best domestic companies producing bimetallic radiators is Rifar.
Domestic bimetallic radiators Rifar have good characteristics. They are manufactured under license from the aforementioned Global brand and are characterized by high heat dissipation, reaching 205 watts. Batteries are really great, and their main advantage is their affordable price. As a result, we get a product that is balanced in terms of characteristics and price.
It is impossible not to mention the products of such a famous Italian brand as Sira. These are durable and hardy radiators with good technical characteristics and low cost - the perfect balance for the products of the famous Italian manufacturer.
You can buy bimetallic heating radiators at any heat engineering store. They are not in short supply, so there will be no problems with the purchase. You only need to be afraid of Chinese radiators, as they can fail with quality.
Bimetallic radiators - customer reviews
You already know which bimetallic batteries are better and which ones are worse. Now it remains for us to consider user reviews.
I have my own installation team and we are engaged in the installation of heating systems. In apartment buildings, we always install Italian bimetallic batteries, famous for their quality. Therefore, our customers are always satisfied - the batteries effectively heat the premises, and some of them even feel hot from such batteries. Bimetal tolerates water hammer well, can work at high pressure. Breakdowns are almost never encountered, as they are very rare. People order such batteries even for private houses, because they want the heating to work for a long time and without problems.
In our apartment there were old cast-iron batteries that literally disfigured the rooms. Last summer we decided to overhaul our entire den. At the same time, the batteries were changed - in the store we were advised to buy bimetallic radiators Rifar Monolith. They are very neat and flat, do not spoil the interiors of the rooms. The craftsmen calculated the number of sections for us, as a result of which it turned out that the new batteries would be smaller in size than the old ones. Now we have an excellent apartment renovation with nice bimetallic radiators. It is very warm with them in winter, so we are already planning to install the same radiators in our son's apartment - he has old steel dust collectors.
My husband and I bought an apartment, but instead of checking in, we decided to make repairs first - otherwise the repairs would have gone into the back burner. They installed new kitchen furniture and completely re-laid the floors. We also decided to modernize the heating and install modern bimetallic radiators. The very first winter showed that the batteries heat well, but one of them showed a leak. It’s good that taps were installed along with the radiators, so we didn’t have to suffer with repairs - they blocked the coolant supply, unscrewed it, and handed it over to the master. Here is such a vaunted Italian quality, although it is possible that we just got a marriage - the rest of the batteries have been working for the fourth year already.
Bimetallic radiators, which, as the name implies, are made from a composition of two metals, began to be produced more than fifty years ago in European countries. They quickly gained wide popularity due to their reliability and operating efficiency when installed in any heating system.
Which bimetallic batteries are better to choose, and what should you pay special attention to? This question always arises for all those who decide to replace old heating appliances with more modern options, which are distinguished by both high performance and respectable appearance.
Today, the production of bimetallic radiators has been established in Russia. Domestic products are quite popular, and have fully justified themselves when installed in central heating systems.
The design of bimetallic radiators
General design principles
This type of radiators consists of two main parts made of different metals.
Their inner part is made of stainless steel or, more rarely, copper, since these metals are highly resistant to the aggressive environment of a heated coolant. Pipes made of these materials are arranged vertically and horizontally, and it is through them that the coolant circulates.
The outer part of the radiators is, in fact, a casing equipped with fins, which is made of. This metal has excellent thermal conductivity and quickly warms up, giving off heat to the premises, which is why it was chosen for the outer part of the structure.
The inner and outer parts of each section of the radiator are joined together by injection molding or spot welding. Sections are assembled into a battery using steel nipples and heat-resistant rubber gaskets, designed for temperatures up to 200 degrees. However, in addition to such batteries, there are also monolithic radiators made of the same materials.
The crimping passport pressure of bimetallic batteries from different manufacturers may vary - this indicator depends on the material of manufacture of internal pipelines and dimensional parameters. If during the pressure testing of certain models a test pressure of 35 atmospheres was created, then they will be able to withstand water hammer, pressure drops during which reaches 25 ÷ 30. This allows the use of such radiators in central heating systems, which sometimes do not differ in the stability of the coolant pressure.
Due to the high thermal conductivity, bimetallic devices turned out to be even more efficient than the familiar cast-iron batteries.
In appearance, bimetallic radiators practically do not differ from aluminum models. However, they can be distinguished by weight, because due to the steel pipe "core", bimetallic batteries are heavier than aluminum ones, by about 50%. In order not to make a mistake when choosing, you should definitely study the certificate of conformity and other accompanying technical documentation, which must be attached to the batches of products, and is located at the seller of a specialized store.
Bimetallic and semi-bimetallic radiators
In addition to bimetallic, semi-bimetallic radiators are also produced. You need to know how they differ from each other, and which ones are better.
- Bimetal devices
In real bimetallic radiators, only the outer casing of the device is made of aluminum.
Their production process consists in the fact that ready-made all-steel cores, laid in special forms, are poured under pressure with aluminum, which conducts heat well, but is not resistant to aggressive environments and high coolant temperatures. In bimetallic versions, aluminum does not come into contact with the liquid medium in any way and serves only as a heat exchanger. The design, made according to this principle, is ideal for installation in both central and autonomous heating systems.
In some models, the core is made of copper, not stainless steel - such batteries are usually used for installation only in an autonomous heating system, where special antifreezes are used as a coolant. Steel pipes, even stainless ones, do not “behave” so adequately with some of these antifreezes.
Water is not the only possible type of coolant
Other liquids are used to dust the circuits of an autonomous heating system, in addition to water - this may be due to the peculiarities of the operation of the system or the requirements of the boiler equipment. More about - in a special publication of our portal.
- Semi-bimetallic batteries
For semi-bimetallic radiators, the internal channels are made of different metals. So, vertical pipes can be stainless steel, and horizontal pipes can be aluminum, as in conventional aluminum radiators. There is also the reverse. In a word, they do not “pull” on full-fledged bimetallic ones.
Be careful - instead of full-fledged bimetallic radiators, there is a chance to purchase lower-quality and reliable semi-bimetallic radiators This type of battery is not suitable for central heating, since the coolant there is often not of high quality and it is fashionable to contain a sufficiently high concentration of alkali. In contact with aluminum, such a composition can cause corrosive processes, which, among other things, will “seize” steel elements installed in combination with aluminum. In addition, the differing thermal expansion of these metals can even cause elements to shift when subjected to extremely high temperatures, which can lead to leaks and even more serious accidents.
Such radiators are often confused with bimetallic ones - outwardly they are generally indistinguishable. Not really understanding the intricacies, they are often preferred because of the more affordable cost. However, as can be seen from the description, they differ quite significantly in their reliability.
In extreme cases, a semi-bimetallic type of radiator can be installed in an autonomous system. But still, if it is decided to make the heating of a house or apartment as reliable as possible, then it is better to refuse semi-bimetallic radiators, and opt for real bimetallic samples. Be sure to consider this when buying.
Monolithic or sectional bimetallic radiators
As already noted, collapsible bimetallic radiators are produced, which consist of sections fastened together with nipples, and monolithic non-collapsible ones.
In the sectional version, each of the sections inside the horizontal pipe sections has a multidirectional thread on both sides, designed to screw in the connecting nipples with sealing gaskets.
This design is the main significant drawback of sectional batteries, since these joints can be damaged from, for example, low-quality coolant, which significantly reduces their service life until the next preventive intervention. In addition, leaks most often occur at the joints of the elements, under the influence of high temperatures and high pressure in the system.
To avoid these unpleasant moments, another technology for the production of bimetallic radiators was thought out. It consists in the fact that at first a one-piece welded copper or steel manifold is made, which is placed in a special form and filled with aluminum under pressure. These bimetallic batteries are called monolithic.
And this bimetallic radiator is a monolithic assembly Both types have their own strengths and weaknesses.
The lack of a collapsible scheme has already been mentioned. And the main advantage of such batteries is that if one of the sections is damaged, you won’t have to change the whole one completely, since it is quite enough to make a bulkhead - to replace or simply remove only the failed element.
In the event of any leakage in a monolithic radiator, it remains only - they have practically no maintainability.
Selective comparative characteristics of radiators of both types are given in the table:
Often the decisive criterion is the question of cost. The fact is that a monolithic type of radiator has a higher price than a sectional one, and this difference can be up to 20%.
When using monolithic bimetallic batteries, it will not be possible to vary the total thermal power - to reduce or increase the number of sections. Therefore, before purchasing them, it is necessary to carefully calculate how much power is needed to heat a particular room. It will not be difficult to choose the right option, since monolithic bimetallic radiators are produced in different sizes, both in length and in height.
When choosing between sectional and monolithic batteries, the features of the heating system should also be taken into account. For example, if they are planned to be installed in an apartment of a high-rise building, then it is better to choose a monolithic type of device, since the pressure in the heating system of high-rise buildings is often quite high, water hammer is not excluded. and connecting nodes of sectional batteries may not withstand it and leak.
Selection criteria for bimetallic radiators
When choosing a specific model, in addition to the characteristics already mentioned above, there are other points that will directly affect the quality of the heat exchange devices and the duration of their operation.
- The design of the radiator must withstand water hammer and high pressure. This is especially important to consider when installing them in a central heating system. Be sure to pay attention to the test pressure indicator.
- The battery material must be inert to the aggressive environment of low-quality coolant with an increased level of alkali or acidity. This factor also mainly applies to batteries installed in multi-storey buildings.
- The material of manufacture must also resist the occurrence of electrochemical corrosion.
- Radiators must be resistant to mechanical stress, that is, their outer casing must have sufficient strength. To check the quality of the aluminum (aluminum alloy) used, you should try to bend the fin with your fingers. In a poor-quality product, the ribs bend easily, and sometimes they can even crack or break.
- Internal ribbed channels should be made of one metal, and it is better if it is high-quality stainless steel.
- The wall thickness of the inner pipe must be at least 3÷3.5 mm.
- Gaskets are an important element in the sectional design of the battery, since the reliability of the connections will depend on their quality and elasticity, so they are most often made of rubber or silicone. You can check the quality of the sealing ring by bending it several times with your fingers. If the gasket is rigid and inelastic, then it is clearly not enough for a long time.
Particular attention to the quality of the nipples - they must be made of durable steel - High-quality steel nipples should be installed in the sectional radiator, in which the internal “antennae” will not break when the sections are twisted and the thread will not “gobble up”. The fact that the nipple is of poor quality can be recognized by the softness of the metal of manufacture.
If this element is of poor quality, then when the battery is unwound or twisted, the key hooks will definitely break off, and then the nipple will have to be sawn with a grinder, and then its parts removed from the section holes.
- The width of the front part of the radiator fin should not be less than 70 mm, since if this parameter is smaller, the heat transfer from the device is significantly reduced. It is best if the size of the section in the section is 80 × 80 mm - such parameters are guaranteed to give high heat transfer.
Optimal depth and width of sections - about 80 mm Some manufacturers use a marketing ploy - they reduce the price of their products by reducing the size of the sections, which significantly reduces the overall thermal power of the device. Therefore, when choosing a radiator, it is advisable to have a tape measure or ruler in your pocket - so that you can control the optimal size.
- For a high-quality battery, the thickness of the protruding ribs should be at least 1 mm.
If the thickness of the fins is less than 1 mm, then this most likely indicates an insufficient quality of the product, since the strength of the radiator casing is reduced in it, and the heat transfer is not so high - due to the low heat capacity of too thin heat exchange plates.
But on this model, the thickness of the ribs is clearly underestimated - it's worth considering ... - You also need to know that if a manufacturer saves on high-quality nipples and gaskets, this indicates that the entire product, with a probability close to 100%, is not of high quality, and it is better to immediately refuse it.
- You should not buy devices for which the manufacturer gives a warranty period of only 1-2 years, despite the fact that the life of bimetallic sectional batteries is 25-30 years, and monolithic ones - even about 50. Such a small guarantee suggests that the manufacturer himself is not confident in his products.
Advantages and disadvantages of bimetallic radiators
positive their qualities are as follows:
- Bimetal radiators fit perfectly into modern interiors of both residential and office premises.
- This kind of radiators is often produced with different colors. If the desired color is not found, then self-coloring is allowed. For this process, special heat-resistant paint formulations are used that can withstand temperatures up to 150 degrees.
- Smooth surfaces and rounded corners make these radiators safe enough from the point of view of the possibility of injury, and therefore suitable for installation in children's rooms.
- The advantage is a fairly long guaranteed service life, subject to the choice of high-quality radiators and their proper operation.
- Bimetallic radiators can be installed in any heating system, even with low-quality coolant.
- This type of device, unlike other modern radiators, is able to withstand high intra-system pressure and temperatures up to 130 degrees.
- One of the key advantages of such batteries is a very high heat transfer.
- Such devices, as a rule, are equipped with a thermostat, which allows you to set the desired temperature for their heating. Its adjustment occurs almost immediately, due to the small cross-section of the channels.
- The number of radiator sections for each particular room can be easily calculated independently using the mathematical formula that will be given below. The correct calculation will help to avoid unnecessary costs when buying radiators, their installation and further operation.
The efficiency of the batteries determines the speed and quality of heating. The modern equipment market offers all kinds of solutions. One of the worthy options are bimetallic heating radiators that meet the main requirements of the heating system: strength, resistance to water hammer, high heat transfer and durability.
We will talk about how to choose the right heating device, in the manufacture of which two metals were used. In the article we have proposed, the varieties popular among consumers are described in detail. Their technical characteristics are given, leading manufacturers are listed.
Externally, bimetallic models resemble ordinary ones. The difference lies in the inner content. The design of composite products consists of two basic elements: an internal steel pipe and an external figured-ribbed body made of aluminum panels. Some radiators use copper instead of steel.
The coolant circulates through an internal steel or copper pipeline. Due to the corrosion inertness, the radiators do not rust and do not react with a chemically active coolant. The outer elements and the inner manifold are connected by spot welding or injection molding.
In terms of physical and operational properties, the batteries are suitable for installation in apartment buildings of any number of storeys and for arranging a local heating system for cottage buildings.
The bimetallic structure determines the characteristics of the device. The steel core explains the resistance to aggressive environments and endurance to pressure drops, the aluminum "shell" increases heat transfer and lightens the radiator
Features of different heating convectors
You should understand the differences between different types of two-metal batteries. Composite products are usually classified according to the following criteria: the composition of the inner core, the external design and the type of metal used.
Bimetallic and semi-bimetallic radiators
Users often confuse true bimetallic batteries with "half-breeds" - semi-bimetallic counterparts.
"Pure" bimetal
Aluminum is used to make the outer casing of the device. The convector core is 100% stainless steel or copper. During the production process, pipes placed in special molds are filled with aluminum under pressure - a sealed structure is formed.
The outer shell is not in contact with the coolant and acts as a heat exchanger. The main feature of bimetallic radiators is high strength and a guarantee against leaks.
A full-fledged bimetal endures the pressure of a centralized and autonomous heating system.
The internal "skeleton" of the radiator is assembled from two metals: vertical guides - stainless steel, horizontal pipeline - aluminum. The reverse combination is also possible.
Such an alliance of metals is not able to ensure the proper reliability of central heating communications. The coolant may contain alkali, which, in interaction with aluminum, provokes corrosion. Destructive processes eventually "transfer" to the steel components of the radiator.
In addition, the integrity of the product may be at risk due to the thermal expansion of metals - leakage is possible at boundary temperatures.
Externally, semi-bimetallic radiators do not differ from full-fledged bimetallic counterparts. "Half-breed" gives out lighter weight and lower cost
It is better to refuse to buy a low-quality composite, especially when it comes to centralized heating.
Sectional and monolithic models
Among the variety of bimetallic heating batteries, two types of structures are distinguished:
- sectional:
- monolithic.
Models assembled from sections attract with variability of characteristics. They provide the opportunity to purchase a device with the exact heat output required for space heating. Monolithic ones do not have such advantages.
Typesetting systems
Collapsible radiators, the panels of which are connected with nipples. Horizontal pipe sections of individual sections have multidirectional threads for joining the mounting nipples and the sealing strip.
Type-setting models are more popular due to their practicality - it is possible to adjust the thermal power by adding or subtracting the required number of sections. An additional plus is maintainability
Disadvantages of sectional radiators:
- joints - weak points of collectors, where leaks are likely;
- limited operating pressure - up to 20-30 bar.
Significant disadvantages also include partial ingress of coolant onto the aluminum "jacket" during leakage.
Monolithic devices
The listed shortcomings are deprived of integral modifications. The cast radiator is able to withstand pressure surges within 100 atmospheres.
Disadvantages of monolithic batteries: there is no possibility to vary the thermal power, overpriced - 20-30% more expensive than sectional models with similar parameters
For high-rise buildings (10 or more floors), experts recommend choosing solid radiators, since there will be significant pressure in the heating system.
Copper or steel core?
Most manufacturers offer steel tube frame hybrid batteries. The main reason is the affordability of the metal and good strength characteristics. The symbiosis of steel and aluminum made it possible to achieve resistance to vibrations, increase the level of heat transfer of the convector and reduce its inertia.
In "copper + aluminum" radiators, the heat exchange tubes are made of copper. Heating panels - aluminum plates soldered to an internal copper frame
Advantages of copper core batteries:
- there is no possibility of corrosion;
- a copper pipeline endures any water hammer - the best option for operation in domestic central heating systems;
- high efficiency of the device - the heat transfer of copper exceeds that of steel.
Copper-aluminum radiators have a long service life - more than 50 years. The disadvantage of copper modifications is the high price.
Technical and operational characteristics
All basic parameters of the radiator are indicated in the passport of the heater.
In order not to make a mistake with the choice, it is necessary to understand the meaning of the following characteristics:
- heat transfer;
- working pressure and temperature;
- center distance;
- dimensions;
- capacity, section weight.
Thermal power. The parameter indicates the amount of heat transferred from the battery to the room atmosphere at a given temperature (+70°C). The indicator is measured in W.
The average heat transfer value of a composite radiator is 140-190 W. The run-up of values is explained by the dimensions of the section and the features of the execution of devices from different manufacturers
Based on the thermal power of one section, the required battery performance for the entire room is calculated.
Working environment indicators. The maximum coolant pressure depends on the thickness of the steel core. The choice of strength is at the discretion of the manufacturer. The parameter value ranges from 15 to 35 bar and is determined based on the operating conditions of the battery.
An important characteristic is the boundary temperature of the coolant. All full-fledged bimetals are able to withstand +90°C. Some manufacturers claim higher thermal stability.
The maximum temperature declared in the passport of the equipment of different trade items: Global Style - 110°C, Tenrad - 120°C, Altermo - 130°C, Grandini - 120°C
Radiator dimensions. Dimensional characteristics include the following parameters:
- center distance- "run" between the axes of horizontal collectors. The standard value is 20-80 cm. Vertically oriented models with increased center distance are used if the layout of the room is not suitable for installing horizontal radiators.
- Geometric parameters determine the height, width, depth of the section. The total height of the radiator often exceeds the center range by 6-8 cm. The traditional width of the fins of bimetallic models is 80 mm.
The depth of the section is 75-100 mm. Some manufacturers, in addition to external panels, add parallel ribs to the design to increase the heating efficiency due to convection currents.
Overall dimensions: a - section height, b - distance between horizontal axes, c - battery depth, d - width of one section. The most popular products with a core height of 35 cm, 50 cm
volume and mass. In bimetallic modifications, the coolant circulates through a round core, unlike aluminum counterparts with an oval-shaped heat conductor. The capacity of one bimetal section is less than the volume of an aluminum section with the same standard sizes.
For example, in convectors with an interaxal range of 500 mm, the fullness of the coolant is about 0.2-0.38 l, with a core height of 350 mm - 0.15-0.25 l.
The weight of a standard bimetallic battery with dimensions of 580/80/80 mm (height / width / depth, respectively) and a center distance of 50 cm is 1.8-2 kg. A smaller mass is one of the signs of a semi-bimetal.
Comparative analysis: bimetal and competitors
Before choosing a bimetallic or other radiator, it is advisable to compare its capabilities with its closest competitors. For composite convectors, these are aluminum, cast iron,.
The assessment should be carried out according to the main criteria:
- heat transfer;
- endurance to pressure drops;
- wear resistance;
- ease of installation;
- appearance;
- durability;
- price.
Heat dissipation. In terms of heating efficiency, aluminum units are leaders, bimetal takes an honorable second place. Steel and noticeably lose.
Aluminum is characterized by minimal thermal inertia - after starting the system, the air in the room warms up for 10 minutes
Water hammer resistance. The most durable are bimetallic units that can withstand up to 40 atmospheres (sectional models). The maximum working pressure on an aluminum heating network is 6 bar, steel - 10-12 bar, and cast iron - 6-9 bar.
It is bimetal that is able to withstand numerous water hammers of a centralized heating system. This property is a key argument in favor of composite radiators for apartment buildings.
chemical inertness. According to this criterion, the positions were distributed as follows:
- Cast iron. The material is indifferent to the adverse environment. Cast iron radiators can be used for decades, transporting an "alkaline", "acidic" environment.
- Steel and bimetal. By itself, the steel core endures the impact of aggressive components. The weak point of the steel pipeline is the interaction with oxygen, contact with which leads to the formation of rust.
- Aluminum. The metal reacts with various impurities in water.
Aluminum walls are especially susceptible to acidic environments - the pH of the coolant must be within 8. Otherwise, corrosion is actively developing.
Ease of installation. In terms of installation, aluminum and bimetallic products are easier. Cast iron radiators are more difficult to mount due to their impressive mass.
In terms of durability, the leaders are composite and cast iron batteries. Aluminum and steel products, subject to operational requirements, must be replaced after 10-15 years. Among the indicated batteries, bimetallic ones are the most expensive
It can be concluded. The purchase of a bimetallic radiator is clearly justified for assembling a heating network in a multi-storey building, where there are risks of pressure surges and contamination of the coolant. In a private house, with stable operation of the boiler and filtration of incoming water, it can be used in affordable aluminum batteries.
What should be considered when choosing a radiator?
To achieve the proper thermal effect, it is necessary to calculate the total power of the battery. Bimetallic equipment is not a cheap purchase, so you should take care of its durability. Conscientious performance of the radiator is guaranteed by trusted manufacturers.
Opportunity assessment - thermal calculation
Having decided on the appropriate technical characteristics and dimensions of bimetallic radiators, it is necessary to calculate the required number of sections.
Basic formula: N=Ptot/Ppas, where Ptot. - the required battery power for the entire room, Ppass. – thermal power of the section according to the accompanying documents
The heat transfer index of the section is taken from the radiator passport, and the total power must be calculated.
Calculation by area
The normalized value of the heat output per 1 sq.m of living space for the middle climatic zone, subject to standard ceilings (250-270 cm):
- the presence of one window and a wall with access to the street - 100 W;
- a window in the room, two walls adjacent to the street - 120 W;
- several windows and "external" walls - 130 watts.
Example. The power of the section is 170 W, the total area of the heated room is 15 sq.m. Additional conditions: window - 1, external wall - 1, ceiling height - 270 cm.
N=(15*100)/170 = 8.82.
Rounding is performed upwards. This means that for heating the room it is necessary to use 9 sections of 170 watts each.
Volume calculation
SNiP separately regulates the amount of thermal power per 1 cubic meter of premises in the amount of 41 W. Knowing the volume of the heated room, it is easy to calculate the heat transfer of the entire battery.
Example. Space heating with the previous parameters. For the purity of the experiment, the power of the section is left unchanged - 170 watts.
N=(15*2.7*41)/170= 9.76.
It is necessary to install a radiator for 10 sections. The second calculation is considered more accurate. When calculating, attention should be paid to the sources of heat loss inside the room.
The calculated value must be increased by 10% if the apartment is located on the first / last floor, the room has large windows or the wall thickness does not exceed 250 mm
How to avoid fakes: radiator inspection
In addition to the analysis of passport data, it would be useful to conduct a visual assessment of the goods. Some manufacturers, in pursuit of customers, tend to “embellish” their products by introducing incorrect data into the documentation.
First of all, pay attention to the thickness of the core and aluminum "shirt", overall dimensions, weight and quality of components.
The minimum thickness of the steel tube is 3 mm. With smaller sizes, the declared strength of the product is significantly reduced - resistance to and development of corrosive processes.
The walls of thin metal open access for the coolant to the aluminum "shell", which, due to chemical activity, begins to quickly collapse
The result of a low-quality steel core is the formation of through holes and the creation of emergency situations on the heating network.
Radiator fins. Aluminum panels must be checked for strength - they should not bend from the efforts of the fingers of one hand. The minimum thickness of the panels is 1 mm.
It is better to choose models with profiled channels between the ribs. The formed confuser increases the air flow rate, increasing the intensity of convective heat transfer.
To reduce the risk of injury, the outer edges of the aluminum panels are rounded off. There should be no streaks, color irregularities and “gaps” on the surface
Dimensions and weight. By individual order, it is possible to manufacture radiators with a section width of less than 80 mm. However, store models with an inappropriate parameter are most likely a fake.
Some manufacturers significantly reduce the width of the internal ribs to reduce costs, "masking" them behind standard-sized front panels. This measure worsens the heat transfer of the bimetallic radiator.
Battery accessories. It is almost impossible to check the quality of gaskets and nipples on site. You should rely on the manufacturer's name and the warranty period. Reliable companies guarantee up to 15-20 years of trouble-free operation.
Rating of popular manufacturers
The review includes high-quality foreign heating systems and domestic products adapted to the changeable conditions of heating systems.
- Global Style (Italy);
- Sira (Italy);
- Rifar (Russia);
- Tenrad (Germany).
Place #1 – Global
It is a recognized leader in the production of heating radiators.
The company produces three series of bimetallic batteries:
- Style - basic characteristics;
- Style Extra - compact dimensions;
- Style Plus - maximum heat dissipation.
The sections are connected by paronite gaskets, which ensure the tightness of the joints. Efficient heat transfer between metals is achieved by casting an aluminum "shirt" under pressure.
Additional characteristics: pressure - up to 35 atm, connection diameter - ¾ or ½ inch, coolant temperature - up to 110 ° C, outer shell - double color
Seat #2 - Sira
The Italian manufacturer positions its product as a premium product. The devices have gained popularity among consumers due to their durability and attractive design. The manufacturer provides a 20-year warranty for a series of full-fledged bimetallic radiators Sira Ali Metal.
Characteristics of Ali Metal products: center distance - 350/500 mm, heat transfer of models - 187/141 W (respectively center distance), pressure in the heating network - 35 atmospheres
Seat #3 - Rifar
The domestic manufacturer has developed a wide range of bimetallic radiators:
- Base - models with a center distance of 200/350/500 mm, a guarantee from Rifar - 10 years;
- Forza - reinforced outer coating, resistant to scratches and mechanical damage;
- Alp - shallow depth (75 mm);
- Monolit is a one-piece radiator.
Batteries of the Monolit series are distinguished by the highest performance index at high coolant pressure.
Technical data: working pressure - 10 MPa, bursting pressure - 25 MPa, maximum temperature - 135°C, warranty period - 25 years
Seat #4 – Tenrad
Bimetal of German quality is suitable for centralized and. It can be used in gravity, elevator and pumping systems with one- and two-pipe wiring.
Distinctive features:
- thickness of vertical tubes - 1.8 mm, collector walls - 3.6 mm;
- three-row finning;
- the side panels are sloped to create a diffuser effect for convective flow.
Two-layer enamel coating of high-quality paintwork materials - when heated, the device does not emit harmful fumes.
Tenrad products are designed for operation in a system with a coolant pressure of up to 35 atmospheres. Bimetal radiators are certified and comply with the European standard EN442
He will acquaint you with the rules for calculating the power and number of radiators for a heating device, which you should read before purchasing appliances.
Conclusions and useful video on the topic
The video review clearly demonstrates the design features of composite radiators and the basic requirements that a high-quality device must meet:
Full-fledged bimetallic radiators combine the positive characteristics of both materials. Batteries are characterized by high thermal power, resistance to water hammer and excellent decorative properties. Their acquisition is a justified investment, subject to the purchase of a certified product.
Tell us about how you chose a bimetallic heating device for your own apartment or country house. Share which argument was decisive in your choice? Please leave comments in the block below, ask questions, post thematic photos.
Article outline
Buying a heating radiator (RO) is not a trivial task. There are many models, they cost differently, and it is not always clear which of the items on the store shelves meets our requirements. Therefore, we will save your time and tell you what to be guided by when choosing. We bring to your attention rating of the 20 best heating radiators for an apartment and a private house. Choose any of them - you won't go wrong!
For a private house or apartment?
There are dozens and hundreds of companies specializing in the production of RO. The competition is insane. Marketers come up with new arguments in favor of their products. This makes the choice in terms of characteristics richer, and making a purchase by an ordinary buyer is more difficult. Let's start with the simplest.
If you need a device for a private house or apartment with an individual heating system, then choose according to power and design. Those. they saw a model that they liked externally, picked it up according to its power / size - and that’s all. For an apartment in a multi-storey building, where the coolant is supplied through the pipes of the centralized heating system, the operating pressure set by the manufacturer must also be taken into account. It should not be below 10-12 atmospheres. Otherwise, the structure will tear when water is supplied.
And now let's deal with the types of heating radiators, traditionally presenting the data in the form of a "tiny" table.
| Comparison criterion | Varieties | Characteristics |
|---|---|---|
| Execution | Sectional |
|
| Tubular |
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| Panel |
|
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| Radiator material | Cast iron |
|
| Steel |
|
|
| Aluminum |
|
|
| Bimetal (steel+aluminum) |
|
|
| Copper |
|
|
| Gasket material | Silicone | Withstands high temperatures, effectively compensating for the expansion of metal structures. Ideal for low pressure heating systems, such as in private homes. |
| Paronite | Paronite is a pressed rubber with an admixture of asbestos and other components. Durable, withstands high temperatures. It is used most often in centralized heating systems. | |
| Fluoroplast | Product made of heat-resistant polymer, installed without lubrication. Withstands all types of coolants. | |
| Cardboard | Impregnated with oil paint, a special cardboard successfully copes with its function in aluminum and bimetallic RO installed in private homes. | |
| coolant | Water | This is not about plain water, but about specially prepared water. It is this that circulates in the centralized heating system. It limits the content of hardness salts (due to which salt deposits form in the pipes - scale) and oxygen (due to which the material corrodes and collapses). The requirements for water in the EU and the Russian Federation are different, therefore, when buying a foreign-made heating radiator, it is recommended to take into account the chemical composition of the water in your heating system. If you wish, you can find it in the ZhES. |
| Antifreeze | Antifreezes or "anti-freeze" are used for systems with an individual heating circuit. They are needed in case of risk of freezing of the coolant due to the switched off boiler. As you know, the coolant is always in the system. If, for example, the water in the system freezes in winter, then due to expansion, it will break pipes, a radiator, etc. Antifreezes do not freeze at average sub-zero temperatures. Ethylene glycol, propylene glycol, alcohol solutions can act as such heat carriers. | |
| Installation location | Stationary | Traditional heating radiators installed in most apartments. Fastening to the wall is carried out using special pin or corner brackets |
| floor standing | The same as stationary devices, only installed on special legs. | |
| Operating pressure* | up to 10 atm. | Such values are mainly typical for panel-type devices. |
| up to 20 atm. and higher | For tubular and sectional RO. | |
| center distance | 350, 400, 500, 600, 700mm | The distance between the axes of horizontal collectors, along which a device is selected for connection to an existing pipe layout. |
| Connection method | Lateral unilateral. (subtype of lateral connection) | The most common and effective solution in terms of using the capabilities of the RO. Connection from the side: from above - to the pipe supplying the coolant, from below - to the outlet. |
| Diagonal (subtype of lateral connection) | Most often used when connecting long devices (from 2 m and above), which allows you to evenly distribute the coolant throughout the entire volume of the structure. Inlet from above, outlet - from the lower opposite side. | |
| Saddle (subtype of lateral connection) | For sectional RO when it is impossible to use other methods. Inlet and outlet from the bottom side on opposite sides of the device. The power of the heat exchanger in this case may drop by 10-20%. | |
| lower | For connecting panel switchgear with pipes hidden under the floor. Inlet and outlet from below at a short distance. The efficiency of the radiator is lower than with side and diagonal connections. | |
| Thermal power** | values in a wide range | Characterizes the ability of the radiator to transfer a certain amount of heat from the coolant to the room per hour of operation. It depends not only on the size and design of the RO, but also on the temperature of the coolant, as well as the air in the room. |
| Dimensions | Average: height 260 to 800 mm, width 270 to 1800 mm, depth 50 to 100 mm | Directly affect the thermal power of the device, because. the volume of coolant circulating in the device depends on this. |
* Before choosing a device, it is necessary to clarify the maximum pressure in the heating system in the housing and electrical power station. Remember that all radiators are suitable for a centralized heating system, except for aluminum ones!
** We are often asked how to choose the right heating radiator in terms of power. To make life easier for you and ourselves, we have developed a handy calculator. Use on health!
For those who want to independently estimate the thermal power, you can use the following technique. We determine the required values per unit area of \u200b\u200bthe room: 100 W / m 2 - one window and one external wall; 120 W / m 2 - one window and two external walls (corner room); 130 W / m 2 - two windows and two external walls (corner room). For example, there is a corner room of 20 m2 with two windows. Then the approximate power of the RO will be: 20 × 130 = 2600 W. Let's make an adjustment for the fact that the passport characteristics of the radiators are tied to the ideal operating conditions of the device - 10% is quite enough. In total, we obtain the required thermal power: 2600 × 1.1 = 2860 W.
It remains only to decide on the desired model, which you can find among the 20 devices selected by us.
| Brand and country of production | Section/panel model and dimensions (W×H×D) | Material, nominal heat flux per section/panel, W | Approximate price per unit/section |
|---|---|---|---|
| 1. | STYLE PLUS 500 (80×575×95) | bimetal, 185 | from 1041 rub. |
| 2. | ALP-500 (81×570×75 mm) | bimetal, 158 | from 630 rubles |
| 3. | RS 500 (80×572×95) | bimetal, 201 | from 850 rub. |
| 4. | Monolit 500 (80×577×100) | bimetal, 196 | from 850 rub. |
| 5. | Piano Forte 500 (80×591×100) | bimetal, 185 | from 1500 rub. |
| 6. | ISEO 500 (80×582×80) | aluminium, 180 | from 790 rub. |
| 7. | Standard Plus 500 (79×531×72) | aluminium, 198 | from 400 rubles |
| 8. | Al 500/80 (79×531×72) | aluminium, 170 | from 420 rub. |
| 9. | ALICE ROYAL 95/500 (80×580×95) | aluminium, 190 | from 560 rubles |
| 10. | Indigo 500 (80×591×100) | aluminium, 185 | from 630 rubles |
| 11. | Logatrend K-Profil 33 300 1200 (1200×300×155) | steel, 670 | from 2000 rub. |
| 12. | Harmony 2-500-12 (70×545×80) | steel, 180 | from 2250 rub. |
| 13. | type 22 500×1000 LU 22-510 (1000×500×47) | steel, 697 | from 2850 rub. |
| 14. | FKO 22 0510 (1000×500×100) | steel, 965 | from 2650 rub. |
| 15. | Style (60×580×130) | cast iron, 70 | from 1500 rub. |
| 16. | MS-140M-05 (104×588×140) | cast iron, 160 | from 500 rub. |
| 17. | Modern 3-745/600 (45×745×100) | cast iron, 102 | from 2000 rub. |
| 18. | Aero H (325×900) | steel, 290 | from 41000 rub. |
| 19. | Karotherm KM90 (500×943×22) | steel, 481 | from 100000 rub. |
| 20. | Apollo 765/05 (76×768×250) | cast iron, 145 | from 6600 rub. |
In addition to the heat exchanger itself, do not forget about the control valves (thermal head) and the Mayevsky crane (if not included), which must be purchased separately. The same applies in some cases to mounting kits. For single-pipe heating systems, a bypass will be required.
We offer you a small rating, which contains the best models of heating radiators. To make it convenient to compare, we tried to select devices with the same number of sections - most often there will be 6 of them. Such a border solution is the most demanded for standard apartments. All prices are for comparison purposes only.
5 bimetal radiators
1. Global STYLE PLUS 500, 6 sections - from 4600 rubles.
STYLE PLUS 500 model of the famous Italian manufacturer Global. A feature of STYLE PLUS 500 is an increased margin of safety - the product is able to withstand pressure up to 35 atmospheres - as well as an increased diameter of the vertical channels connecting the horizontal collectors. To seal the joints of the sections, special silicone gaskets are used, designed for contact only with treated water - other types of heat carriers are not allowed. This bimetallic product is designed in such a way that air pockets do not form inside, preventing the correct operation of the device. Warranty - 10 years.
2. RIFAR ALP-500, bimetal, 6 sections - from 3800 rubles.
In 2002, the Russian company Rifar quickly broke into the production of heating radiators for private houses and apartments, and has since achieved considerable success. The main specialization of RIFAR is the development and production of bimetallic and aluminum devices. In the RIFAR ALP-500 bimetallic radiator model, high heat transfer is achieved due to the developed side surface of the section. Therefore, the design turned out to be very slender - only 75 mm thick! On sale there are models with the number of sections from 4 to 14, connected through silicone gaskets, which provide uncompromising tightness. RO can be made in any of the colors of the RAL 9016 palette. However, it should be borne in mind that only specially prepared water should be the coolant for such a device - “antifreeze” used in heating systems of private houses will not work here. 10 year warranty.
Check out a ten-minute video about the manufacture of the Rifar radiator:
3. SIRA RS 500, bimetal, 6 sections - from 5100 rubles.
Under the Sira brand, high-quality Italian ROs are produced, including the model we are interested in - RS 500. Reliable, stylish and efficient - this is how this product can be characterized. The company is more than half a century old, so only proven solutions are used: a solid steel contour with an outer layer of aluminum, high-quality painting. It differs from other solutions in the absence of sharp corners. The warranty is 20 years. However, keep in mind that the mounting kit is non-standard, not available everywhere, so it’s better to buy it first.
4. Rifar Monolit 500, bimetal, 6 sections - from 5600 rubles.
It is not by chance that the Monolit 500 model from the previously mentioned manufacturer Rifar appeared in our rating. Everything is due to the fact that the Russian company has really succeeded in developing innovative solutions for heating. The product fully justifies its name - it is monolithic, the sections are conditional here, because they are welded together, forming an integral structure. Thus, the possibility of coolant leakage is reduced to zero. This RO can withstand pressure up to 100 atmospheres! Plus, there are practically no restrictions on the coolant used. The manufacturer's warranty is 25 years.
5. Royal Thermo PianoForte 500, bimetal, 6 sections - from 9000 rubles.
Do you want a bimetallic radiator to be not only reliable, but also look sophisticated? Evaluate the possibilities, which looks like a piano keyboard. In addition to the fact that the product from Italians has an original appearance, many technologies were used for its production: additional fins on vertical channels (POWERSHIFT), asymmetric arrangement of sections (3D HEATING), the ability to use any coolant, including antifreeze (ABSOLUTBIMETALL), seven-stage painting etc. The device is available in three colors. Warranty - 25 years.
Watch the video about the main advantages of "Royal Thermo":
5 aluminum radiators
6. Global ISEO 500, aluminum, 6 sections - from 3200 rubles.
– compact sectional die-cast aluminum radiator. It can operate on specially treated water or at temperatures up to 110×C and pressures up to 6 atm. - for a couple. On sale there are 8 modifications that differ in color, the number of sections can reach 14 pcs. The manufacturer positions it as a model designed for operation in the Russian Federation. This is due to the design feature: a developed area and a large volume of coolant circulating in the device. Due to this, it works effectively even with low temperature water. Warranty - 10 years.
7. Thermal Standard Plus 500, aluminum, 6 sections - from 2400 rubles.
This and other RO models have been produced in the Russian Federation for almost 20 years at JSC Zlatmash, which is a defense enterprise. It specializes in aluminum appliances, instead of casting technology, pressing from hardened profiles is used. The main advantage lies in the price and high rated heat output. The volume of the section is small, which allows you to quickly adjust the temperature of the product. A working pressure of 24 atmospheres is more than enough for normal operation in any apartment buildings. The number of sections in a standard delivery varies from 3 to 16. With a declared service life of 25 years, the manufacturer's warranty is 5 years. Only specially prepared water can be used as a heat carrier.
8. Oasis Al 500/80, aluminum, 6 sections - from 2500 rubles.
The Oasis brand belongs to the Forte Prom GmbH holding, and despite the English name, we are again dealing with Russian products. The aluminum radiator Al 500/80 is produced by injection molding: each section is cast and then the bottom is welded to it. Classic design with a developed side surface, a significant amount of coolant in the system, as well as a 15-year warranty - this is how this device can be characterized. Models are supplied in 4, 6, 8, 10 and 12 sections.
9. Sira ALICE ROYAL 95/500, aluminum, 6 sections - from 3300 rubles.
Flowing lines give the ALICE ROYAL 95/500, produced under the Sira brand, a versatile look. Therefore, the device will look good in any room. The product is made using injection molding technology, it is reliable and durable. A limit of 16 atmospheres for working pressure is enough for installation in most high-rise buildings. Warranty - 15 years.
10. Royal Thermo Indigo 500, aluminum, 6 sections - from 3800 rubles.
Despite the Italian roots, it is produced in the Russian Federation. In addition to the original design, this device uses an interesting reverse convection technology, thanks to which cold air is cut off from the windows. This became possible due to the design of the upper part of the RO, with the help of which a reverse flow of warm air is formed. Additional fins on the vertical channels increase the heat output by 5%. The ultra-resistant layer of paint ensures the preservation of the original appearance of the product throughout the entire service life. Warranty - 10 years.
Watch the Royal Thermo innovation video:
5 steel radiators
11. Buderus Logatrend K-Profil 33 300 1200, steel - from 6000 rubles.
Under the famous German brand Buderus, a wide range of heating equipment is produced, so we simply could not help but add the successful model of the Logatrend K-Profil 33 300 1200 steel radiator to our rating. It is a steel panel unit with three panels and fins and side connection. It is distinguished by the presence of safety edges - a huge plus for families with children. Among the features include the presence of a built-in Danfoss thermostatic valve, which increases the efficiency of the device by 5%. In addition, the RO itself can be installed on either side - it does not have a designated rear. There are many modifications in the series with 1, 2 and 3 panels, with and without convection plates. Warranty - 5 years.
12. KZTO Harmony 2-500-12, steel - from 27,000 rubles.
Another interesting steel model is presented by the Russian enterprise KZTO RADIATOR, which has been operating since 1997. We are talking about the Harmony line of sectional devices, in which the section is made in the form of a double-walled pipe - a coolant circulates inside. This design provides efficient heat transfer, looks stylish, and is easy to maintain. By default, it is supplied for wall mounting. The service life is 25 years, the warranty is 5 years.
Watch a video about installing a KZTO Harmony radiator:
13. Lideya type 22 500 × 1000 LU 22-510, steel - from 5700 rubles.
Products of Belarusian manufacturers are represented on the Russian market quite widely. Radiators are no exception, competitive due to affordable prices and good quality. Model Lidea type 22 500 × 1000 LU 22-510 from the Lidselmash plant is made of cold-rolled steel, the panel thickness is 1.2 mm. Already by the designation it is clear that the design of this device is as follows: 2 panels, 2 convectors. The mount is universal (supplied in the kit), in addition to branch pipes for side connection, there is also a pair for the bottom one. This RO can be installed in any heating systems, including gravity ones. Warranty - 5 years.
At the time of writing, there were problems with access to the official website of the plant (http://lidselmash.by/).
14. Kermi FKO 22 0510, steel - from 5300 rubles.
Devices from Kermi are in great demand in the CIS. At the moment, the German company offers four lines of steel RO. We are interested in the therm-x2 Profil-K or FKO series, model 22 0510. This is a two-panel device with fins to increase heat dissipation. A small amount of coolant is a guarantee of a rapid change in the temperature of the product. There are top and side screens that give the product a finished and aesthetic look. Side connection. Warranty - 5 years.
15. Terma Aero H (325 × 900), steel - from 41,000 rubles.
The rather well-known Polish company Terma produces many devices for heating, and Aero H (325 × 900) is one of the most successful. This is a design decision, so do not overestimate its thermal capabilities. Smooth lines of the device will be appropriate in any modern room, whether residential or office. A small mass allows you to hang the device even on a plasterboard base. The only caveat is that such a RO can only work in a private heating system with low pressure, i.e. not suitable for apartments. Available in several sizes, there are horizontal and vertical modifications, many colors.
5 cast iron radiators
16. Viadrus Styl, cast iron, 6 sections - from 9000 rubles.
Positioned by the Czech manufacturer as designer, but in fact - almost classic cast-iron radiators also got into our small rating. Unlike its counterparts, the capacity of each of the sections of such a RO is small, which means that the amount of heat received can be quickly varied. The disadvantage of this approach is low power. Regarding the advantages, one cannot fail to note the possibility of side and bottom connection. The product already has a thermostatically controlled valve built in for this purpose. Various color schemes are possible. Manufacturer's warranty - 10 years.
17. MZOO MS-140M-05, cast iron, 7 sections - from 3500 rubles.
Such radiators can often be seen in old houses. Many still consider them the best solution for heating an apartment. We are talking about a real legend - cast iron product MS-140M. In this case, the product is manufactured at the Belarusian enterprise JSC "MZOO". What can be said about such devices? It is enough that they are bought even second-hand and boldly built up in their apartments - the low price decides everything. Almost indestructible with proper operation, although the manufacturer gives a modest warranty of only 3 years.
18. EXEMET Modern 3-745/600, cast iron - from 12,300 rubles.
The cast iron tubular design of the radiator looks stylish and interesting. This floor product, the name of which speaks for itself - its laconic lines can decorate almost any room. The device is available in various colors, texturing is possible, as well as additional surface treatment, such as polishing, patination, etc. The number of sections in one RO can reach 26 pieces.
| Characteristics | Meaning | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | cast iron | ||||||||||
| Thermal power, W | 612 | ||||||||||
| Number of sections, pcs. | 6 | ||||||||||
| Max working pressure, atm. | 10 | ||||||||||
| Center distance, mm | 600 | ||||||||||
| Connection | lateral/diagonal | ||||||||||
| The volume of water in one section, l |
| Characteristics | Meaning |
|---|---|
| Material | steel |
| Thermal power, W | 481 |
| Number of sections, pcs. | 1 |
| Max working pressure, atm. | 4 |
| Center distance, mm |
