What is an instantaneous electric water heater. What is an electric flow heater? What is an electric water heater

The presence of hot water is one of the main and integral attributes comfortable life. Its temporary shutdown can bring a lot of inconvenience to modern citizens. In addition, not all summer cottages and villages are provided with hot water. To eliminate this circumstance, electrical instantaneous water heater(direct-flow, non-pressure) from Electrolux, Ariston, Termex and other manufacturers. Such a boiler works in automatic mode, the main condition is the presence of a source of water and power supply.

What is an instantaneous water heater

Achievement modern science and technicians - a flowing electric water heater that allows you to use hot water for domestic needs all year round, is a small device with a heating element. The latter is a heating element (tubular electric heater) or an open spiral. The open helix is ​​used in very compact devices in the form of nozzles on the faucet, because. there is simply nowhere to put the heating element there. Heating takes place in a copper flask.

Externally, the device is a relatively small plastic case, which is connected to a source of electricity and a water supply system. For hot water there is only one way out. Depending on the purpose, performance, such a device can provide water with a constant temperature to one or more points of water intake. However, some models are equipped with mechanical system management, others - electronic. Undoubted advantage is the ability to adjust the power and water heating, especially for an electronically controlled boiler.

How does it work

Having decided to install a structure that would provide the opportunity to use a hot shower in any season of the year, first familiarize yourself with the principle of its operation. The electric hot water heater is switched on when the tap is opened, i.e. appearance of water flow. The water then heats up to optimal temperature, after which it is simply maintained at the same level. There are no storage tanks of different sizes in the boiler.

Due to the fact that this type of water heater is a high power electrical appliance, it requires separate electrical wiring. In addition, the device must be grounded. As a system of protection against overheating and burns, special devices are used - regulators-limiters. In some models, they work when the water heating temperature exceeds 65-70 degrees.

Types of instantaneous water heaters

The flow boiler is of pressure type and non-pressure type. The first one is called a water heater in a different way. closed type- it is connected to the gap water pipe. It has a large capacity and can provide water supply to several points of water intake. Connection of a non-pressure (open) water heater is performed as in a simple household appliances, i.e. by diverting a water pipe or flexible hose. Supplies only one point. The advantage is low cost and low power, which will save on electricity consumption. Kinds:

• nozzle on the kitchen faucet;
• faucet with electric water heating;
• a separate device, fixed next to the shower / sink.

pressure head

Regardless of the technical characteristics of any water heater flow type, including the budget model, is a completely economical device in terms of water consumption. The fact is that the user, standing in the bathtub or in the shower, does not have to wait long for the water to reach the required temperature. A pressure appliance, great for kitchens, is always under mains pressure. One of the popular options for such a heater:

• model name: Thermex System 800;
• price: 3330 rubles;
• characteristics: mechanical control, power consumption 8 kW (220 V), dimensions (WxHxD) 270x170x95 mm;
• pluses: it is cheap;
• cons: poor build quality and materials.

If you are looking for a more powerful device, then take a look at one of the Stiebel water heater models:

• model name: Stiebel Eltron DHC-E 12;
• price: 25878 rubles;
• characteristics: productivity 5 liters of water per minute, mechanical control, power consumption 10 kW (220 V), dimensions (WxHxD) 200x360x104 mm;
• pluses: there is a system of protection against overheating;
• cons: it's expensive.

Non-pressure

A non-pressure heater has the same principle of operation as a pressure heater, just a special mixer acts as a safety group. In the closed state, it blocks the water at the inlet, and when heated, it discharges excess water. On sale you can find devices from different manufacturers, so be sure to consider the advantages and disadvantages of each option you are interested in. Here is one of inexpensive models:

• model name: Timberk WHE 3.5 XTR H1;
• price: 2354 rubles;
• characteristics: mechanical control, power consumption 3.5 kW (220 V), dimensions (WxHxD) 124x210x82 mm, productivity 2.45 l/min., weight 800 g;
• pluses: it is cheap, there is an overheating protection system;
• cons: low performance.

Among other non-pressure heaters, pay attention to this type of device:

• model name: Electrolux NP4 Aquatronic;
• price: 5166 rubles;
• characteristics: power consumption 4 kW (220 V), dimensions (WxHxD) 191x141x85 mm, output 2 l/min, weight 1.42 kg;
• pros: reasonable size, good value for money.
• cons: low power.

For shower

It is not a problem to buy such a product as a flow-type water heater in St. Petersburg, Moscow or another city in the country today, it is more difficult to decide on the appropriate option and optimal power. Depending on the build quality and operating conditions, the purchase made can last about 5-7 years. To answer the question of which instantaneous water heater is better to buy in an apartment for taking a shower, check out a few popular appliances. Compare all parameters, including approximate power consumption. An inexpensive purchase can be:

• model name: Atmor Basic 5;
• price: 1778 rubles;
• characteristics: mechanical control, power consumption 5 kW (220 V), productivity 3 l / min., set consists of a shower head, a plug for an outlet, a hose;
• pluses: low cost, compactness;
• cons: a small length of the shower hose.

Another popular and sought-after representative of this category of instantaneous water heaters is:

• model name: Delsot PEVN 5;
• price: 2541 rubles;
• characteristics: power consumption 5 kW (220 V), productivity 3 l/min., set consists of a shower head, hose, dimensions (WxHxD) 206x307x65 mm;
• pluses: low cost, ease of connection;
• cons: poorly heats water.

mechanically controlled

Correct the operation of the heater, i.e. You can change the degree of water heating using the regulators, which are located on a special panel. The control may be mechanical or electronic. The first is often called hydraulic. An attachment for a hot water faucet or a separate standard appliance with this control always turns on at maximum power - even if there are several heating modes. It is necessary to change the degree of heating manually, i.e. switching modes after power on. Here is one option:

• model name: AEG DDLT 24 PinControl;
• price: 37100 rubles;
• characteristics: power consumption 24 kW (380 V), productivity 12.3 l / min., maximum water heating temperature + 60 ° C, dimensions (WxHxD) 226x485x93 mm, weight 3.3 kg;
• pluses: big power;
• cons: high cost.

Check out another option - a three-phase Kospel electric water heater:

• model name: Kospel KDH 21 Luxus;
• price: 11354 rubles;
• characteristics: power consumption 21 kW (380 V), productivity 10.1 l / min., dimensions (WxHxD) 245x440x120 mm, weight 5.1 kg;
• pluses: big power;
• cons: high cost.

Electronically controlled

Electronically controlled instantaneous water heaters have gained considerable popularity today. They are distinguished by high power and higher cost. This is due to the fact that installations of this type have heating elements with multi-stage power control. In addition, these devices have several sensors and a microprocessor that processes data and regulates the operation of the heaters. A prime example is:

• model name: Stiebel Eltron HDB-E 12 Si;
• price: 19285 rubles;
• characteristics: power consumption 11 kW (380 V), productivity 5.4 l / min., dimensions (WxHxD) 225x470x117 mm, weight 3.6 kg, there is an overheating protection system;
• pluses: good power, pressure;
• cons: high cost.

If some of the characteristics did not suit you, then check out another option:

• model name: Stiebel Eltron DHC-E 8;
• price: 25838 rubles;
• characteristics: power consumption 6 kW (380 V), productivity 3 l / min., dimensions (WxHxD) 200x362x105 mm, there is an overheating protection system;
• pluses: temperature limit to 60 ° C;
• cons: high cost.

How to choose an instantaneous water heater

When choosing, first of all, you need to correctly select the optimal power of the installation. In this case, it is easier to focus on the number of taps that must be simultaneously supplied with hot water. If there are three such points in the living space, then the power of the device should be from 13 kW and more, if 2 - within 8-12 kW, and if 1 - up to 8 kW. Choose the type of control: hydraulic or electronic. The first is cheaper, the second has more power and modern "stuffing".

Pay attention to the performance of the device, i.e. water consumption. The average value for a shower is 5 l/min, for a washbasin and a sink with a mixer it is 2-4 l/min, and for a bathtub with a mixer it is 3.5 l/min. When choosing, make sure that you have the same value for both power and performance. Only in this way will the instantaneous water heater provide you with water heated to the set temperature. Otherwise, you will have to ensure that more than one tap does not open at the same time.

To make the purchase, regardless of the cost and high / low power, turn out to be optimal, make a kind of monitoring of prices, promotions, discounts, sales for a particular running water electric heater with a heating element, compare the characteristics of several models that can be ordered from the catalog in the online store with delivery by mail or by purchasing at the nearest hardware store.

Video

With the absence and interruptions of hot water, preventive and repair work heating systems are faced by most urban residents. Do you want to forget about this problem forever? To do this, you need to buy a good instantaneous electric water heater. Water heaters are divided into flow and storage. The former are compact in size and heat water instantly, while it passes through the internal elements of the device. This method of heating is more efficient, but more energy intensive. Concerning storage water heaters, then they have a large capacious tank in which water of the required temperature is located. Which water heater is better flow or storage depends on the specific purpose of the destination. household appliance.

To find out which instantaneous water heater is better to choose, we have compiled a review of the TOP 7 best electric instantaneous water heaters.

Water heater Zanussi 3-logic 3.5 S (shower)

Which instantaneous water heater is better to buy? We recommend that you pay your attention to the Italian company for the production of household electrical appliances - Zanussi.

Flowing electric water heater with a capacity of 3.7 liters per minute. Maximum temperature water heating +50 0 C. Consumers will also be pleased with the adequate cost of the unit - $30 .

Water supply is carried out in a non-pressure way with one point of water intake. Mechanical control of all settings and functions. On the body there is a light indicator for turning on the device and heating water. There is also a limitation of a certain heating temperature. The tubular electric heater (TEH) consists of copper and consumes power of 3.5 kW.

The security system consists of 4 degrees of protection against ingress of water and pollution, automatic shutdown of the device without water, protection against overheating. The set includes a shower head, a durable shower hose, a water filter.

The disadvantages include: high consumption of electrical energy, non-pressure water supply, special fasteners are required, insufficiently reliable design.

Water heater Hyundai H-IWR1-3P-CS

You can also buy a good instantaneous water heater from the concern Hyundai, which produces not only cars, but also climate equipment, as well as a variety of household electrical appliances, including instantaneous electric water heaters.

A device with a maximum water heating temperature of +85 0 C and a heat exchanger capacity of 3.5 kW. The water unit is controlled mechanically. The built-in indication of the inclusion of the heater will prevent accidental start of the device without water.

Long service life of the device will be ensured by reliable and solid construction. Safety: 4 degrees of protection against moisture, protection against overheating.

The package includes a filter for water purification, a shower faucet and a nozzle for it, a shower hose. Low cost water heater ( $37 ) makes it available to almost every buyer.

The weak point of the model is the low power (3.5 kW), short network cable(1.5 m), there is no indicator for turning on the heating, a rather rigid hose for the shower head.

Water heater Timberk WHEL-3 OS

The company from Scandinavia for the production of the best instantaneous water heaters - Timberk known not only to the contingent of engineers and builders, but also to ordinary homeowners.

Model with a capacity of 1.9 liters of water per minute and a fairly high power of 3.5 kW. One point of water intake (non-pressure). The electric flow unit is controlled mechanically.

This robust design is ultra-sensitive to supply water temperature. The device requires water with an outlet temperature of 15-20 0 C. In view of this, Timberk WHEL-3 OS is designed for use in the summer.

The protection system consists in the presence of a safety valve, in limiting the heating temperature, in protection against overheating of the copper heat exchanger, as well as 4 degrees of protection against moisture ingress.

The package includes a shower head-watering can and a shower hose for it, a filter for water purification. The cost of this household appliance is minimal - only $43 .

To weaknesses can be attributed to low productivity (1.9 liters of water per 1 minute), non-pressure water supply, cannot be used in winter time of the year.

Water heater Ariston Bravo E 7023 U-F 7

The main characteristics inherent in household electrical appliances for the home from the popular Italian brand Ariston - stylish design, an excellent basic set of functions and an inexpensive price (this model costs $64 ).

One of the best instantaneous electric water heaters has good performance - 4 liters of water per minute and high power - 7 kW. Pressure water supply (several points of water intake). On the case there is an indicator of turning on the device. The spiral heating electroelement provides the accelerated heating of water.

The security system is equipped with a protective automatic shutdown in the event of a power failure, thereby preventing the risk of electric shock. Overpressure safety valve, overheat protection function.

The package includes a faucet, a shower head, a filter for water purification.

This model is not deprived of disadvantages: poor thermal insulation, installation of special electrical wiring with grounding is required.

Water heater Electrolux NPX6 Aquatronic Digital

You can buy a good instantaneous water heater for a fairly affordable price - $157 . This flowing Swedish electric water heater has a capacity of 2.8 liters of water per minute and a power of up to 5.7 kW.

The digital display located on the case will allow you to set the necessary settings. Built-in function of smooth limitation (control) of the water heating temperature (especially relevant for families with small children).

The protection system includes protection against overheating and 4 degrees of protection of the spiral heating element against water ingress (anti-corrosion coating protects against oxidation, ingress harmful substances and breakdowns).

The compact size of the device allows you to install it even in small kitchen, small bathroom or use in the country.

The disadvantage of the model is low productivity (2.8 liters per 1 minute).

Water heater Stiebel Eltron DHB-E 13 SLi

A three-phase instantaneous electric water heater from the German reputable manufacturer Stiebel Eltron is associated with reliability, high quality and appropriate value. $831 .

To the question “Which instantaneous water heater is better?” the answer is unequivocal. The Stiebel Eltron DHB-E 13 SLi model has a spiral-shaped plastic heat exchanger and consumes 14 kW of power. Maximum water heating - up to +60 0 С.

Convenient and simple electronic control, built-in self-diagnosis of faults, function-indicator of turning on the device and the beginning of water heating. There is also a water temperature limiter.

The protection and safety system consists of 5 degrees of protection against ingress of water and "air", automatic protection against overheating.

Cons of a water heater - its high cost, high flow electricity.

Water heater AEG DDLE 18/21/24 TrermoDrive

Well-known German company AEG engaged in the production of household electrical appliances and power tools from 1887 to 1996. AT given time only the popular brand survived.

Instantaneous electric water heater AEG DDLE 18/21/24 TrermoDrive with a capacity of 12.3 liters of water per minute and a maximum water heating temperature of +60 0 C. Very high power consumption - up to 24 kW. Several connected points of water intake (pressure). The average cost of an electric water heater is about $1020 .

Convenient, electronic control is carried out using a remote control. The display will show all the necessary settings: temperature (built-in thermometer), time, self-diagnosis of problems. There is an indicator for turning on the device and its heating, as well as limiting a certain heating temperature. The spiral heating electric inner element is protected by 5 degrees from water.

Additional functions: there is an ECO mode button, automatic water consumption, a built-in shower program. This best instantaneous electric water heater is also suitable for heating solar panels(up to 60 0 C at the inlet).

The disadvantage is the rather high cost of an advanced unit.

Flow type electric water heating systems have significant advantages over storage devices. First of all, this is a perfect design and compact dimensions of the unit, allowing you to install equipment in small rooms. They also emit a high rate of heating water, which facilitates household work.

In order to decide which is better to buy a flowing electric water heater, you should know that the installation of the device requires an individual electrical cable and a circuit breaker on the shield. Therefore, the installation of equipment is prohibited in the buildings of the old type of development. AT this case It is recommended to use equipment with a power of up to 3.5 kW.

How to calculate the required power?

A good instantaneous water heater must meet not only the criteria of the consumer, but also the flow of water that is required to perform all domestic processes.

The maximum value of the power indicator of an electric heating device is calculated according to the following formulation:

Deciphering the constituent characters:

• P is the maximum value of the power of the device, kW;
• R - consumption of circulating water, liters for 60 seconds;
• T - the required temperature regime of the liquid coming from the mixer;
• ∆t - the required temperature increase, o C. ∆ t = T - tv.
• Твх - temperature regime of cool liquid: cold season +5°С, hot season - +15°С.

These values ​​can also be determined more in a simple way. The performance indicator inherent in the most suitable option must be divided by two. As a result, the estimated water consumption in liters per minute will be released at a temperature regime of 20-30 ° C.

For example, a device with an efficiency of 16 kW provides the user with 8 liters of heated fluid per minute. This amount will be enough to fulfill one of the goals listed in the table.

If it is necessary to dilute the water supply at several points, you need to focus on the intake of the most frequently used water. If you plan to pick up at several nodes at the same time, then you should choose a high-performance unit.

It is recommended to install an instantaneous electric water heater 13-36 kW in residential buildings where consumption is provided a large number electricity. In connection with the division of classifications, two types of units were formed: three-phase and single-phase.

Pressure or non-pressure devices

In addition, the technique has two groups of pressure and non-pressure equipment.

Flow-through electrical units of pressure type, make it possible to use water from any mixer mounted in the cottage. The device is installed directly on the cold and warm outlet pipeline. This method is considered the most convenient in case of turning off the centralized water supply system.

Starting and stopping of the device is carried out at an automated level, using a control unit that responds to the flow rate.

A set of the best instantaneous water heaters includes bath-shower and kitchen attachments. Details function exclusively on one water pressure unit. This modification is most suitable for use during the warm season in a private house.

If the water intake mixers are located on long distance from heating technology, it will be more profitable to purchase separate devices for each node. This method will significantly reduce the energy consumption for heating the liquid in the pipes.

VIDEO: how the protochnik works

Since non-pressure technology is not able to provide a house large quantity liquids, the openings of the shower element are small. Thus, you can get a good pressure.

If the coolant has a high hardness index, it is necessary to regularly flush the nozzles with a solution that removes scale.

Most non-pressure equipment is designed for use in countries with warm climatic conditions. The devices are not designed for severe weather conditions, so they cannot perform well at low temperatures. Water heating will occur no more than 30 ° C.

Overview of popular models

The technical market represents a wide range of heating equipment from various manufacturers. In order to choose the right device, you should study specifications the most suitable models.

The equipment differs in technical characteristics, performance and additional options. The units of the Swedish company are equipped with a spectacular heating element in the form of a spiral.

The instantaneous electric water heater for the faucet has an expanded clay filter and a copper flask.

The Polish brand is one of the best instantaneous water heaters of the system and non-pressure type. The parts that have direct contact with fashion are made up of copper and brass material.

The entire line of these units is equipped with an overheating protection system, has safety valve. The front panel is decorated with a display, where there are indicators of temperature, on / off. The main complaint of users is frequent shutdowns and periodic “shoot through” cold water.

When using, care must be taken to ensure that the device does not operate at full capacity. This leads to overheating of the wiring and a possible short circuit.

The kit does not include wire and plug. They are purchased separately. The recommended cable section is 4 mm. A separate connection through the machine is required. The quality is excellent. In its price category, it is the leader, which consistently enters the TOP 10 instantaneous water heaters.

The line of this manufacturer is equipped with a complete set:

• overheat protection;
• water filter;
• plug and wire for connection

In general, it is characterized as a medium-power trouble-free device, convenient to use and quite reliable. Due to its low performance, it does not need separate wiring, but for safety reasons, it is not recommended to turn it on simultaneously with other powerful electrical appliances.

Model WHE 4.5 XTR H1 requires mandatory grounding. As for negative feedback, then here many users agree on one thing - it is inconvenient without an on / off button. First you have to open the tap, and then plug the device into the outlet.

Before ordering a 2016-17 water heater in an online store, you should first answer a number of questions:

1. The possibilities of the house in which the installation of the device is planned. Do they meet the requirements of the unit.
2. Decide on the installation method and, if you do not plan to carry out the process yourself, order the installation service from a specialist.
3. Check warranty periods and availability of spare parts.

In any case, regardless of the state of the wiring, first of all, after the purchase, a separate cable is made and brought to the shield. It would also be advisable to check the condition of the water supply, and connect the water heater using flexible hoses.

VIDEO: How to choose a water heater? Which one is better to buy?

Very often in high-rise buildings there is a problem of lack of hot water. What remains to be done is to buy. It is best to purchase electric ones, they are more reliable. But which one to choose flow or storage? For constant use, it is better to take a flowing one, it heats as much water as you spend. We will talk about how to choose and install instantaneous electric water heaters in this article.

What is an electric water heater

A flowing water heater is a small box equipped with a heating element (heater), passing through it, the water is heated without accumulating in the tank. That is, the water begins to heat up, only at the moment of passage through the water supply. Some models are equipped with a thermostat, which regulates the temperature.

Instantaneous water heater Electrolux

Water heaters can have electronic and hydraulic control. The first is the most convenient, it monitors and maintains all work processes. As a rule, such devices have LCD displays on their body, which display on / off indicators, heating temperature, flow force, power, etc. Hydraulic is a simpler option, it works from a flow sensor. When the user turns on the tap, the heating element starts to work and the water heats up. When the water is blocked, the heating element will automatically turn off.

Attention! With hydraulic control in water heaters, the water temperature depends on the capacity of the water heater and the flow rate.

The main characteristics of electric instantaneous water heaters

When buying a new heater, it is necessary to carefully study the technical characteristics of the selected model, the method of attachment and control. This is necessary so that you can install this unit, and it meets your desires. What exactly you need to pay attention to when buying:

Instantaneous water heater device

• Power. The instantaneous water heater consumes a lot of electricity, it requires a separate electrical wiring, and it must be grounded. Low-power heaters operate from a standard 220 V network, but more powerful ones (from 12 kW) must be connected to a three-phase 380 V network.

Attention! If the declared power of the device is more than 5 W, then it may not be suitable for installation in an apartment.

• Pay attention to the type of instantaneous water heater, they are pressure and non-pressure. If the unit is pressurized, then this means that it works due to pressure. It must be installed in the riser of the entrance or cottage.
• Before purchasing a water heater, find out which maximum pressure water is supplied to the house. It is necessary that it be from 0.6 to 16 atmospheres. If the pressure is unstable or too strong, choose models that have a safety valve that turns off the water heater at the right time. If the water pressure is too low, experts advise purchasing a storage heater to avoid burnout of the unit.
• Often in the description you can see the word "protection class". This phrase means the quality of the body of your unit. The abbreviation IP stands for the standard for protecting electrical equipment from harmful influences. environment, and subsequent numbers indicate protection against damage from solid objects (first digit) and water (second digit). Example: IP 25, indicates that the body of the heater is protected from touching with fingers and splashing water.

Flow water heater connection diagram

• Be sure to check how the water heater is mounted. Installation can be vertical or horizontal, as well as mixed, i.e. installed in both ways.
  Also pay attention to the type of water supply. If the unit is installed above a faucet, then it is necessary to choose the bottom connection method, and if under the washbasin, the top type connection. In the first case, the pipes are directed downwards, in the second - upwards.
• Make sure that the selected device has a water overheat mode. It protects the heating element from excessive incandescence, turning it off in time. This will protect you from unexpected fires.
• Some models of heaters work in combined mode. For example, if a small amount of water is needed, they are used as a storage unit, if a large flow rate is used as a flow unit. This saves electricity.

This type of heater does not provide for a tap, only an inlet and outlet for water, but it can be connected simultaneously to several mixers. In the event that the hot water supply is turned off, you can get heated water at any point in the apartment where there is a tap. Usually the units are installed under the sink. It turns on automatically, and depending on the manufacturer, it can be single-phase and three-phase.

Instantaneous pressure water heater

The main advantage of pressurized water heaters is the support desired temperature water and the ability to work at high blood pressure, and the disadvantage is a large consumption of electricity. It is also convenient to work with it: you do not need to turn on the heater separately, the water supply is regulated by a valve on the water tap. Such units keep the water temperature in the range of 30-60 degrees.

AT this type heater pressure does not exceed the external atmospheric pressure. Available in power from 2 to 8 kW. Able to heat water for 1-2 points in the room. It is not difficult to use such units: open the tap at the inlet, and when the water supply starts, turn on the water heater power button. The temperature is regulated by the water supply: the lower the pressure, the higher the temperature. As soon as the pressure of the water supplied to the unit decreases to 0.33 atm, the heater will automatically turn off thanks to the minimum pressure switch.

Non-pressure instantaneous water heater

The main advantages include:

• high efficiency and energy saving;
• overheat protection;
• low cost.

The disadvantage is considered to be low pressure and limited use (for no more than 2 points).

How to install instantaneous water heater

Conventionally, the installation process is divided into 3 stages:

• Installing the device on the wall. The place must be chosen so that it is easy to use the heater, but at the same time it does not interfere when using a washbasin or bath. The water heater must be mounted above your head. First you need to outline the place of attachment. The unit must be located strictly perpendicular to the floor. Any curvature leads to the fact that the heating element will not be completely covered with water and will quickly burn out. At the marked points, drill holes and drive dowels into them, and then hang the device.

Installing a water heater on a bathroom wall

• To connect heater to the mains, it is necessary to make a calculation permissible load to the switch. It is calculated as the product of current and voltage. This calculates the sum of all devices connected to the network, and also think about whether new equipment will be purchased in the near future. If the total power does not exceed the declared one, replace the machines with a current of at least 50 A. In the terminal block we connect the wires: to the phase - white, to the working zero - blue, to the ground - yellowish-green.

Scheme of connection to water supply points

• Finishing stage– connecting the heater to cold water. We connect the inlet of the heater to the shower head (indicated by an arrow pointing inside the unit). Move the faucet to the "shower" position and direct cold water to the heater. Connect the shower head from the kit to the outlet. It has thin nozzles that limit the amount of water supplied, if you put a regular nozzle, the flow will be large and the water will not have time to heat up.

Thus, thanks to the flowing electric water heater, you will always have hot water in unlimited quantities. Well, and what is important, the price of flow heaters is lower than accumulative ones. And everyone can install it, the main thing is to carefully study the instructions.

Types of flowing electric water heaters: video

Flowing electric water heaters: photo

Household heating systems of the flow type are distinguished by a simple control system and compact dimensions, since they do not require an additional tank for operation. The process of work consists in the circulation of water through a tubular heating element, where it is instantly heated to a certain temperature. The best way to equip a house with an uninterrupted supply of warm water is to install instantaneous water heaters for an apartment.

Brief specifications

Modern equipment is divided into several types, which involve the use different ways fluid heating:

• The heating coil or heating element operates on the basis of electricity;
• Work is carried out through the use gas burner;
• Functioning occurs thanks to the heat exchanger through which water passes and acquires the desired temperature regime.

The easiest to use are electrical devices- they are very easy to connect, work without problems, but consume a lot of electricity. The average power of such a heater is 3-5 kW.

The most economical are gas, but they require the house to be connected to gas networks and are installed exclusively by specialists with a tolerance category.

VIDEO: How to choose a water heater? Which one is better to buy?

Rules for choosing a flow apparatus

The task of how to choose an instantaneous water heater for an apartment must be approached as responsibly as possible. In order not to make a mistake in the choice, you should answer a few questions.

1. What energy source will the device work on?

Today, there are two types of energy source: gas or electricity. If the house is heated gas boiler, you can generally purchase a double-circuit boiler, which both heats and provides hot water. Both circuits are autonomous and are not interconnected in operation.

In the absence of gas, electric flow-through boilers are chosen, which are installed in the immediate vicinity of the water intake point - on the tap, on or instead of the shower, near the sink as an additional source of hot water, etc. The performance of the device depends on the type of wires installed. For example, in old buildings, shields are designed for maximum current supply up to 16A. They can withstand the power of equipment no more than 3.5 kW. Later buildings have shields that can withstand 32-40 A, in this case a powerful device can be used, with a value of up to 8 kW.

Regardless of the quality of the wiring and the year of construction when installed electrical device a separate wire should be additionally routed from the unit to the electric machine.

1. Type of equipment

There are two types of equipment: non-pressure and pressure. The second option is more suitable for the apartment, which during the installation process is mounted directly on hot and cold water pipes. The device has the ability to provide hot water to several mixers at once.

However, if the purpose of purchasing the device is to seasonally shut off the centralized water supply, you should choose a non-pressure option. Often it has less power and is equipped with additional shower heads. This unit is intended for heating the coolant only in the summer season, in winter it is not able to effectively cope with the work.

1. Equipment performance

Here, to a greater extent, you need to find out what water consumption is required for domestic purposes, taking into account the incoming and outgoing temperature conditions. It is these parameters that are recorded in the passport of the instantaneous water heater for the apartment.

To calculate, put a container with a known volume under the tap and note one minute. The amount that is accumulated over a given period of time is the main parameter for choosing a device.

The temperature of the incoming water is of fundamental importance. If it is at around 14 ° C and above, the output will be the degrees declared by the manufacturer. The lower the inlet temperature, the cooler it will be, respectively.

Experts recommend purchasing equipment from a well-known manufacturer. Since dubious products will significantly save investments, however, problems with a quick breakdown of the unit and hard-to-reach parts may arise a little later.

Installation of low-quality equipment in a house or apartment can lead not only to difficulties associated with its operation, but also to a violation of the security of the entire property.

In order to figure out how to choose a tankless water heater for an apartment, you need to correctly assess the upcoming load. For a family of four, you will need a device with a power of 14-16 kW. The volume of water in this case will be 5-8 liters per minute, which is enough for 1-2 points of water intake.

The maximum temperature should be at least 50°C, but keep in mind that in winter it can be 3-5°C lower at the outlet. Since it is about domestic use, the power supply must be rated for 220 V, frequency 20-30 Hz. If the house is private or there are regular voltage drops in the network, buy devices with a frequency of 30 Hz. If voltage stabilizers are installed, 20 Hz can be dispensed with.

Do not buy appliances without overheating protection. The IP30 marking is mandatory for protection.

As for probes, it is better to prefer anti-corrosion ones, but some manufacturers have already released a line of steatite ones. Both of them performed equally well in operation.

When the choice is made, be sure to ask the sales assistant for a certificate of quality conformity and do not forget about the warranty period.

Popular brands, models and reviews about them

As already discussed a little earlier, the use of more powerful models is not advisable for an apartment, as with a private house, the situation is different. Therefore, we give examples of less productive units that occupy a leading position in the technical market.

Instantaneous electric water heater for the kitchen Atmor Basic 3.5 kW

Power 3.5 kW and maximum fluid flow - up to 3 l / min. The budget version of the heating system is capable of delivering temperatures up to 40 ° C under one condition, if the liquid at the inlet to the apparatus is not colder than 18 ° C. Estimated cost varies from 1000 to 1500 rubles.

The main user complaints are frequent shutdowns and “shoot through” of cold water when turned on at high power.

Water heater Polaris Vega T 3,5

Power 5.5 kW and productivity - 4.3 liters. Thanks to the universal shape, the appliances can be mounted under a bathtub, a washstand or in a niche. The package includes a faucet and a shower head.

In general, there are very few negative user reviews, the equipment is called solid, which fully justifies its affordable price - 2000 rubles.

Instantaneous water heater for apartment Cartridge PE-VN-220

It has average cost- up to 2600 rubles. Power does not exceed 5kW, consumption - 5l / min. The device involves the treatment of low quality water, therefore it is equipped with an additional protective layer, increasing operational terms technology.

Electric instantaneous water heater Electrolux SMARTFIX 2.0 S (3.5 kW)

A very high quality line of equipment, equipped with all the necessary protective equipment. Average productivity - 3-4 liters. Power 5.5 kW. Very compact size, sleek design. They are conveniently placed in niches. The only drawback is the price. On average, such equipment will cost 5,000 rubles.

AT modern models predominantly steatite heating elements, which even in comparison with anti-corrosion prolongs the service life. Maximum temperature 50°. Parameters - 220V, 20-30 Hz. Everything is very high quality.

Instantaneous water heater Thermex System 1000 (wh)

Universal water heaters that are in demand among consumers, but at the same time have a number of complaints. First of all, this concerns the lack of gaskets for the thermostat. Limiting the operating frequency to 25 Hertz, which, if the voltage drops in the network, can affect the operation of the equipment. It is advisable to immediately install a voltage stabilizer and not use the device at full capacity.

In the pros - thermal switches, high-quality regulators and versatility. Most have 3 modes of operation. Price - 5500-6000 rubles.

How to install the device?

First of all, it is necessary to mount the device directly on the wall, and then connect it to common system plumbing.

Next, a power connection is required. Even if the instantaneous water heater has a low power, a separate electrical conduit should still be run for it. This process must be carried out based on the factor that not every electric meter is able to withstand a large current load.

Wiring diameter and type of automation is selected based on technical features water heater and meter. It is important to remember that the standard outlet through which the equipment is planned to be connected must have a grounding element.

After that, the device is connected to the water supply directly to the tap or the shower head is replaced, depending on the configuration and type of device.

VIDEO: Instantaneous water heater. circuit diagram connections