The best instantaneous water heaters

With such an assortment in stores, choosing the best instantaneous water heater will be easier if you understand how they are designed, what operating parameters are key, and what to pay attention to. To make it easier to find the right model, we have prepared for you a rating of instantaneous water heaters in 2024, and also described the main characteristics that are most important when choosing.

The operating principle of an instantaneous water heater is to heat water as it passes along a hot heating element. The device prepares only the volume of water that will be used. This means that energy is spent exclusively on business. Gas appliances have an open or closed combustion chamber, inside of which a heat exchange unit is enclosed. Electric water heaters come in the form of a separate wall unit, a mixer with a built-in heating element, or a faucet attachment.

Inexpensive electric

Inexpensive instantaneous water heaters are used as a standby option to have hot (warm) water during seasonal outages and in case of accidents. Such devices have relatively low power and are able to heat water for only one intake point; they have no “bells and whistles”. Everything is simple and inexpensive, but they cope with the main function.

Atmor Lotus 3.5

Heat from an Israeli company is produced in Israel and China, depending on your luck. The manufacturer guarantees the same high quality regardless of the location of assembly.The products meet the requirements of ISO 9002, American, German and Russian standards.

Device power 3.5 kW. Lotus 3.5 is connected to a 220V outlet. The connection is from the bottom, the device itself is mounted on the wall. The design of the device is pleasant, the control keys are located on the front panel. The degree of heating is selected from three options. The set includes a shower head. It allows you to use warm water economically; accordingly, at low pressure, the water has time to heat up to a comfortable temperature.

Overheat protection.

Laconic design, compact size.

Zanussi 3-logic 5.5 TS

Zanussi makes good water heaters, and the flagship model in the lower price segment, the 3-logic 5.5 TS, is proof of this. This is one of the most popular budget models on the Russian market.

The heater power of 5.5 kW provides a heating delta of 20-40 degrees. Maximum temperature 40 degrees. Connects to a power cable. The TS modification includes an adapter for faucet and shower. The manufacturer carefully added everything necessary for installation to the heater.

Protection against overheating and switching on without water.

Capacity 3.7 l/min.

Ultra-compact, 27 by 14 cm.

Thermex Urban 5500 shower

The power of this device is also 5.5 kW, but the productivity is 2.2 l/min when heated to 35 degrees and 3 l/min when the outlet temperature is 25 degrees. Mechanical control, rotary switch. The device is made in a minimalistic manner, looks expensive, attractive, and at the same time neutral, which will allow it to fit into any interior. There is only one water intake point, here it is a shower head. The heater is mounted horizontally, above the sink and the lower connection.

According to user reviews, it heats water well.

Convenient watering can with economical water consumption.

Reliability.Minimum complaints for this model.

Electrolux Smartfix 2.0 5.5 T

Modification of the device with the index “T” involves connecting a tap. The heater contains an improved copper heating element, which provides high efficiency and good heating speed. The power here is 5.5 kW. The productivity of the device is 3.1 l/min. There are 3 levels of heating with step adjustment. The controls are intuitive.

This model is sensitive to the quality of the water supply network. Operating pressure range 0.7-6 atm. To prevent emergency situations, a temperature and water flow sensor are installed. The manufacturer recommends connecting the device to a 3*4 wire, to a separate circuit breaker.

Good performance, heats water to hot water at medium pressure.

Simple connection (described in detail in the instructions), clear controls.

Kospel EPO2 Amicus 6

The heater can be connected up and down, meaning it can be installed either above or below the sink. The device itself is a compact rectangular box. There aren't even any keys on it. The heater has a hydraulic unit that automatically turns on when the hot water tap is opened.

Device power 6 kW. At a temperature of 30 degrees, productivity is 2.9 l/min. The device can work with several water intake points. The set includes a fine-jet aerator that allows you to reduce water consumption by 50%.

Versatility: Choice of top or bottom mounting.

Several collection points.

Atlanta ATH-7425

Interesting heater model. The design and installation method are unusual. The heater is attached directly to the faucet. It is a small horizontal cylinder with an inlet pipe on one side and an outlet aerator on the other.On the front side there is an information board that shows the water temperature. The power of the device is 3 kW, and the declared heating temperature is up to 85 degrees. The temperature depends on the passing flow. Everything you need to connect the device to work is included in the kit.

Installation directly on the tap, universal mount to any tap.

Fast heating, high heating temperature.

Unusual design and compact size.

The best electric ones in terms of price/quality ratio

The best price-quality ratio means that customers' expectations from the use of equipment will be met. Inexpensive devices will be simple but reliable. Expensive heaters are multifunctional, safe and last for many years. Every ruble in price is justified - this is an excellent ratio in favor of the buyer.

Electrolux NP6 Aquatronic 2.0

The model belongs to the middle price segment. Device power 5.5 kW, temperature delta 20-50 degrees. The heater is pressure, designed for several water intake points. The AQUATRONIC series devices are equipped with a highly efficient copper heating element. It vibrates during operation (Pulsten mode), thereby reducing the formation of scale around it. There is also protection against overheating and switching on without water pressure. These measures increase the service life of the heater. The pipes are located at the top.

NP6 Aquatronic 2.0 operates from a 220 V network. Control via a hydraulic unit. For the user, this means that he regulates the water temperature as before, without a heater: by pressure and using a mixer.

Extended service life.

Convenient installation.

EVAN V1-7.5

The Russian-made heater is designed for operation in a private home, commercial and social facilities, but can also be connected in an apartment to a 220 V network. The device contains block-type heating elements made of stainless steel. Power 7.5 kW, capacity up to 3 l/min. The device itself is heavy and well made.

The top liner allows you to avoid air pockets in the flask. The check valve protects against dry starting. The temperature sensor automatically turns off the device at 85 degrees. The water temperature is smoothly regulated in the range of 30-70 degrees. Can be used at multiple collection points.

Reliable, strong, well assembled. Piece-by-element repairs are possible.

High performance, heating up to 70 degrees.

Possibility to use as a flow-storage heater.

Stiebel Eltron EIL 3 Premium

The heater was designed and assembled in Germany, while it meets all the requirements of Russian reality. The spiral heating element with the 5th degree of protection can safely work in hard water. Device power 3.2 kW, connection to 220 V network via a 2.5 sq. mm cable. The water temperature can be set within 30-50 degrees. The control is electronic, essentially “climate control”: the user sets the required temperature, the rest is taken care of by the heater. Eltron EIL 3 Premium is one of the most compact models in size, measuring only 19 by 14 cm, depth 8.5 cm. It can be installed both above and below the sink. The manufacturer recommends installing the heater as close as possible to the point of collection, so as not to waste heat on logistics. The device operates stably with pressure up to 10 atm.

German assembly, 2 year warranty.

Versatility: top or bottom installation, can be placed on several fence points.

Electronic control, protection options.

Thermex Chief 7000

A stylish, compact, powerful and at the same time relatively inexpensive heater will help you survive the seasonal outage of hot water in comfort. Power 7 kW, installation is possible only directly from the panel, on a separate machine. It looks interesting, you won’t want to hide such beauty. Installation above the sink, with bottom connection. On the front there is an LED display integrated into the touch control panel.

The maximum water temperature is 48 degrees. Electronic control. The water heater is designed to work with several consumers. For safety, sensors are installed to protect against overheating and switching on without water. Lower response threshold 2 l/min. Productivity at a temperature of 25 degrees is 4 l/min, and at 35 degrees 2.5 l/min.

Stylish, compact.

Powerful, good performance.

Ariston Aures SM 7.7

This model occupies a borderline position between the middle and lower price segments, but in terms of quality it can be classified as average. The manufacturer provides a 2-year warranty on its device. Device power 7.7 kW. Adjustment in steps: choice of 3.3 kW, 4.4 kW or 7.7 kW. The heater contains a wet heating element, which speeds up the water preparation process and increases efficiency. Energy efficiency class A.

The device has a laconic design, the controls are simple and intuitive. Bottom liner, installation above the sink. Ariston Aures SM 7.7 is capable of working with multiple consumers. Multi-stage protection guarantees safe operation.

The water gets really hot.

Inexpensive but reliable.

CLAGE CEX 11/13

This is premium quality equipment. The functionality is impressive, and so is the price. The heater is designed to operate from a three-phase 380 V network.Power 13.3 kW. The water temperature can be set by pre-programming the values ​​in increments of up to 0.5 degrees. The maximum outlet temperature is 60 degrees. By purchasing the optional FXS 3 kit, remote control becomes available. The installation is horizontal with a bottom connection; there can be several points for collecting finished water. The set temperature and information about the operating mode are projected on the display. The performance of the device is similar to that of a geyser: up to 5 l/min of hot water. At the same time, CLAGE CEX 11/13 operates silently, unlike gas competitors. When the voltage in the supply network decreases, the operating power decreases, but the device continues to operate.

Capacity up to 5 l/min, enough for several intake points with good water pressure.

Fine adjustment in 0.5 degree increments.

German components and assembly.

Inexpensive gas

Instantaneous gas heaters are used both as the main source of hot water and in case of seasonal outages as a standby option. In private houses, cottages, and also in apartments where there is no central hot water supply, but there is gas, this is the most convenient and cost-effective way to heat water. The technology has been proven over the years, so among the inexpensive models there are worthy examples.

Neva-Transit VPG-8E

A simple, modern and reliable Neva water heater will solve problems with hot water. Despite the minimum price in the rating, it has all the necessary “conveniences”: electric ignition, the ability to control gas pressure and water temperature, overheating protection, traction controller, freeze protection. There is a display on the front panel that shows the water temperature.The column's productivity is 8 l/min, it is easily enough for several sampling points. Net power is 18 kW.

Despite the ridiculous price, it has excellent performance characteristics.

Comfort options: electric ignition and adjustments.

LENZ TECHNIC 10L WATER

The power of this heater is 20 kW, the output is 10 liters of hot water per minute. You can set the water temperature yourself. For safety, there is a temperature sensor in the dispenser that monitors overheating and gas control. Ignition is automatic when the hot water tap is turned on. The ignition is powered by batteries.

It starts up quickly and heats up quickly.

High power and performance.

Vivat GLS 20-10 L NG

A geyser with a delicious design is produced at a specialized thermal equipment factory in China. The heater control is simple and straightforward. There are gas and temperature controls on the body, and the degree of heating of the water in the tap is regulated by the mixer. The device starts working automatically when you open a hot water tap. Capacity 10 l/min. The connection is from below, the heater is mounted vertically on the wall.

Bright, juicy design.

Good quality.

Zanussi GWH 6 Fonte

Compact, quiet but powerful heater, capacity 6 l/min. The device is equipped with a copper heating element coated against corrosion. There is protection against overheating and flame extinction (gas control). This increases service life. Control on the front panel, gas pressure and water temperature are adjusted smoothly using rotary switches. There is a display that shows the water temperature.

Compact, only 30 by 48 cm.

Protection options: overheating, water pressure sensor.

Superflame SF0120 10L Glass

This heater is produced at the Tula Gas Equipment Plant.Device power 20 kW, productivity 10 l/min. The device can operate on natural and liquefied gas. The model is not sensitive to low water pressure. Vertical installation, wall-mounted with bottom connection. There is only one water intake point. All necessary protection options are installed here: gas control, overheating and dry start. Lights up automatically when hot water is turned on. The user can choose the speaker design to suit his taste: classic white, silver, gold or with a photo.

Reliable, well assembled.

Lights up quickly, even at low pressure.

Vektor 10G

This model can operate on both natural and liquefied gas. The productivity per water intake point is 10 l/min. Maximum temperature 65 degrees. Gas and water consumption can be adjusted manually. The water temperature is displayed on the display. Front panel design to choose from: white or with a 3D pattern (mountains, drops on black, waterfall, berries and others). The multi-stage protection system ensures long and safe operation.

Triggers at low pressure.

It works quite quietly.

There is a selection of interesting designs.

The best gas in terms of price/quality ratio

When buying quite expensive, complex equipment, the consumer expects a certain quality and functionality. A high price does not always guarantee better quality. Often the manufacturer adds part of the cost for the name, reputation, or sometimes just for the design. A rational buyer pays for something more important and necessary than just a brand name. The list of geysers with an excellent price-quality ratio includes models whose price is justified by their quality.

Vilterm S 10

The Vilyerm geyser is assembled in the Krasnodar region, at the specialized thermal equipment plant YugEnergoprom. High-quality, using technologies that have been proven over the years, but in a laconic modern design, the speaker is designed for use in everyday life: in an apartment or a private house. Trunk natural gas or liquefied gas can be used as fuel. The power of the device is 17.9 kW, and the productivity is 10 l/min (at 25 degrees). Ignition is automatic.

The heater has an energy-efficient copper heat exchange unit and a brass water unit. The multi-stage safety system includes protection against flame extinction, lack of draft, dry start and decrease in water pressure, and overheating.

Quality of materials and workmanship.

A modern, technologically advanced speaker that is easy to use.

FERROLI VERONA 11 D (NG)

The heater instantly prepares hot water for use. Device power 17 kW, throughput 10.8 l/min. Maximum heating temperature 60 degrees. The built-in gas reducer makes the heater operate stable, independent of the pressure in the line. The digital indicator shows not only the actual water temperature, but also the operating mode and battery charge on the auto-ignition. The front panel also has water and gas flow controls. The design of the speaker is pleasant: simple shapes and a minimum of details.

Stable operation under a wide range of surrounding conditions (gas pressure, water pressure).

Attractive appearance, information board.

Wert 16E Silver

Column capacity 16 l/min. It is suitable for work in a large private house, an apartment with several bathrooms or a small enterprise.Despite the high performance, the dimensions of the heater are small, one might even say standard 40 by 70 cm. The manufacturer achieved this effect by designing a burner with transverse horns. The highly efficient heat exchange unit is made of oxygen-free copper. The inlet pipe is reinforced. All these measures increase the service life of the heater as a whole.

Power is 32 kW, productivity is 16 l/min, and the dimensions are standard.

Extended service life due to innovative technical solutions.

Rinnai BR-W24

Rinnai BR-W24 is a Japanese premium water heater. Its productivity is up to 25 l/min. Thanks to the proportional supply of gas and air to different combustion zones, maximum operating efficiency is ensured with minimal gas consumption. Unique multi-stage overheating protection allows the heater to operate around the clock without stopping. Full protection, there are even carbon monoxide detectors in the room.

Maximum heating temperature 70 degrees. The user himself sets the desired heating temperature with an accuracy of 1 degree. The multi-faucet automatic adjustment system guarantees compliance with this value, regardless of the number of consumers simultaneously connected and consuming treated water.

Economical gas consumption.

High performance.

Exceptional safety measures, self-diagnosis.

Oasis 26 kW

Reliable heater, average in price, with high power (26 kW) and productivity of 13 l/min. The operation of the device is fully automated. The user only needs to regularly change the batteries on the ignition and set the heating temperature in accordance with his preferences.The front panel contains switches for controlling water and gas flow, a key for selecting between the “winter/summer” modes and a display. Gas control automatically stops the gas supply to the burner if the flame accidentally disappears (for example, due to a draft).

The model is available in several design solutions.

High performance, fast heating.

Mizudo VPG 4-14 T

This is a high-tech, economical, stylish speaker, which in terms of characteristics belongs to the premium sector, but in terms of price it is rather average. In this model the combustion chamber is closed. Heater power 28 kW, productivity 14 l/min. The temperature can be set, and the automation itself will monitor its maintenance. The “hot start” option allows you not to program the device every time, but to use a preset mode. The dispenser runs on mains gas. Innovative technologies allowed the manufacturer to increase efficiency to 88%, reducing gas consumption by 15%. The device is assembled at the Powtek plant, China.

Everything that can be considered as a protective option is here: from overheating, dry start-up, gas control, traction control, safety valve against water hammer, self-diagnosis mode.

Stylish appearance: display and touch panel design, using heat-resistant enamel that does not lose its appearance.

Stable operation at low water pressure.

"Hot start" mode.

10 best heating taps

A flow-through heater in the form of a tap is the most space-efficient option. And there is also no energy loss when transporting finished water to the point of collection. This option is also inexpensive. Therefore, it can be argued that a heating tap is the cheapest way to solve the problem with hot water. The main disadvantage: hot water will only come from one tap.

Umnitsa PKV-1

A nice and simple faucet has a built-in RCD for safe operation. Water protection class 4. Device power 3 kW, maximum heating temperature 65 degrees. You can connect it to a simple 220 V outlet. There is a convenient rotary switch with which you can set the desired water temperature. The gander is quite long and swivels, so it can be installed on a sink with two compartments or between the sink and the bathtub.

Instant water preparation: heats up to 60 degrees in 5 seconds.

Connection to a simple outlet.

Long swivel spout.

UNIPUMP BEF-012-02

The power of this tap is also 3 kW, plugged into an outlet (voltage 220 V, current 13.6 A). Connecting diameter 1/2”. The heater is cylindrical in shape and has a display on the front surface that displays the actual temperature. The temperature is regulated by water pressure. Maximum heating up to 60 degrees. The gander is tall, standard “L”-shaped with an excellent aerator.

Easy connection.

The water heats well.

Water temperature indication.

Atlanta ATH-7422

Visually, this model is very similar to the previous one. But Atlanta costs more because it has added security options. There is a temperature sensor that monitors overheating and dry start protection. The maximum water temperature is 85 degrees. The temperature is regulated by a tilt-and-turn lever: less pressure – hotter water. Minimum water pressure 0.5 atm. Device power 3 kW.

Protection against overheating and switching on without water.

Plugging into a simple outlet.

PROFFI Classic PH8840

Simple in appearance and technically, the inexpensive faucet is designed for vertical installation, with a connecting diameter of 1/2”.The tap power is 3 kW and can be plugged directly into an outlet. This model heats water quickly and well. Maximum – 60 degrees. The adjustment is smooth, the switch is “obedient”. This faucet is perfect as a standby option for a dacha, a change house, or for heating water during the season when the hot water supply is cut off.

Inexpensive, but high quality.

Easy to use.

Thermofix KV-74S

This faucet is made in the form of a high-tech style mixer with a hidden heating part. Visually, it’s hard to understand that this is not just an interesting mixer, but a heating device. Device power 3.3 kW. There is protection against overheating and operation without water. The heating temperature depends on the water pressure, its value is visible on the display on the front surface of the device. The Thermofix heating tap is manufactured in Russia, the quality is excellent.

High quality materials and workmanship, excellent appearance.

Protection against overheating and operation without water pressure.

You can use it like a regular mixer, without heating.

Electrolux Taptronic, black

For its quality and capabilities, this model is inexpensive. The price/quality ratio here is in favor of the buyer. The heater looks stylish, it is compact, and outwardly it looks like just a good, expensive mixer. Device power 3.3 kW. Thanks to SilverSafe technology, heating efficiency was increased to the maximum. AirFuse technology is responsible for safe operation (the chamber with the heating element is not completely filled with water). There is protection against overheating and against starting without water. The digital display shows operation indication and water temperature data.

Economical consumption of energy and water.

Extended service life.

Excellent value for money and quality.

Rostov Manufactory Plumbing SL127EL-022F

In appearance, this faucet stands out among the rest. It has a symmetrical shape with two adjusting levers. Heater power 3 kW, connection to a regular 220 V socket using a 1.5 mm cable. The heating temperature can reach 60 degrees. The actual value is shown on the display. The overall height of the heater is 35 cm. The spout is rotary and protrudes 23 cm beyond the vertical. It looks elegant.

Unusual, stylish appearance.

Very good quality metal and plastic, looks expensive, lasts a long time.

Thermex Hotty 3000

A high-quality faucet with a 2-year manufacturer’s warranty has all the necessary protective functions: against overheating, against operation without water, and a built-in RCD. Crane power is 3 kW, productivity at 25 degrees is 1.7 l/min, and at 35 degrees 1.2 l/min. The heater is mounted instead of a mixer and looks neat. There is a display with indication of operation and heating temperature.

There is a Sedal ceramic cartridge with a resource of up to 1 million cycles.

Efficient, fast heating element made of stainless steel.

2 year warranty.

Zanussi SmartTap

The uniqueness of this model lies in the use of a flexible spout, which can be installed in a convenient position. Heating element power 3 kW. The water temperature is regulated by pressure, maximum – 60 degrees. For economical water consumption, as well as to reduce pressure for better heating, an aerator is installed. The water temperature value is shown on the display.

Flexible gander.

Easy installation, works from a regular 220 V outlet.

Atlanta ATH-7421

The efficiency of the device declared by the manufacturer is more than 98%. This means that the house will have hot water without an unimaginable waste of electricity. Heater power 3 kW. Maximum temperature 85 degrees.The heating temperature depends on the pressure, the power is fixed. You can view the actual readings on the display.

There is protection against turning on without water.

Energy efficient.

10 popular manufacturers of instantaneous water heaters

There are manufacturers whose electric water heaters are better than others. The accumulated experience, technical base and constant search for new solutions allow some brands to produce equipment that is relatively inexpensive, but superior to competitors in terms of characteristics and quality.

Electrolux

From the first days of its existence, the Swedish company relied on two development factors: the search for new, interesting technical solutions and technical design. Some of the equipment is manufactured at factories in Europe; there are representative offices in China and Russia. Electrolux produces flow-through heaters from simple low-power models without special installation requirements to commercial high-power options in the upper price segment. Regardless of the price, this is quality, thoughtful ergonomics and safety during operation.

Bosch

Bosch is represented in a line of gas flow-through heaters and can offer several electric models. All copies are made with German meticulousness: the quality of materials and workmanship is excellent, the thoughtfulness of the details is amazing. The appearance of the equipment in the style of constructive minimalism is recognizable.

Thermex

This Russian company specializes in thermal equipment: water heaters, boilers, heaters. Production sites are located in China and Russia. At Termex you can see a full range of water heaters: from a faucet attachment to serious models capable of providing hot water for a large house.All heaters have an exquisite appearance. They look more expensive than their price. The quality also exceeds expectations.

Zanussi

The Italian company produces inexpensive flow heaters of three types: gas water heaters, electric medium-power wall-mounted heaters, and taps. Most models are simple in functionality, with a straightforward design, but affordable to a wide range of buyers.

Neva

Neva gas water heaters are manufactured at the Gazapparat plant, which has been producing household gas equipment since 1960. At the moment, the technical aspects have been perfected. Neva is the most purchased gas water heater in Russia. These are functional devices that meet modern requirements for comfort and safety. The water heaters have automatic ignition, gas control, and other useful options. The manufacturer also took care of the appearance: there are models with an interesting design and color scheme.

Ariston

Italian Ariston equipment is mainly presented in the middle and above average price segment. But if we talk about water heaters, there are very budget models available to everyone, and there are also super expensive options. Ariston is an Italian design that will decorate any interior. For the company, the reputation is key, so the quality of components, assembly is at a height, regardless of the price. The Ariston model range includes gas and electric heaters.

Stiebel eltron

A German company that specializes in heating equipment, focuses on "green" technologies and energy efficiency. The brand's equipment belongs to the premium price segment. The buyer receives high-tech, efficient equipment with a 3-year warranty, and a real service life of up to 10 years or more.Stiebel eltron produces only electric heaters.

Atmor

And this is an Israeli company that deals not just with heating equipment, but with instantaneous water heaters. Atmor flow devices are inexpensive, simple, but reliable and functional. They heat water well, last a long time, and the number of complaints about the product is minimal. At the same time, the heaters are like nameless Chinese analogues. For that kind of money, the best thing you can choose is Atrom heaters.

Oasis

The Oasis company is a subsidiary of the German holding Forte. Oasis specializes in heating equipment, focusing primarily on the Russian market. We offer faucet attachments and gas water heaters. Oasis geysers have automatic electric ignition and a “winter/summer” mode, which allows you to reduce gas consumption for water preparation.

Ladogaz

The domestic manufacturer of gas equipment knows all the nuances of operating boilers in our reality. Therefore, it takes them into account in its equipment. Ladogaz gas flow heaters have an extended service life. Components in contact with water are not afraid of corrosion and scale. The equipment is not sensitive to the quality of water and gas supply. The column lights up even at low pressure, stably heats the water, maintaining the heating parameters specified by the user.

What to look for when choosing

The choice of electrical equipment that works with water must be treated with special attention. It is not enough for it to simply perform its functions. The water heater must be safe, easy to use and maintain. A checklist with the main parameters and characteristics of the heaters will help you make your choice.

Dimensions and installation width

A flow-through electric water heater is usually installed either in close proximity to the point where the finished water is collected (above or under the sink), or in a utility unit, from where it is possible to distribute water to consumers. In any case, the place for its installation should be thought out in advance. If this is a faucet attachment, then there is no special space required and the issue is resolved by itself.

Due to its dimensions, the device should not fit end-to-end in the designated location. You need space for water supply and cooling.

Even with horizontal installation, the block itself can be vertical or horizontal. For example, most Zanussi models are horizontal 25-27 cm by 13 cm in height, and among Atrom and Thermex there are also vertical ones.

Type of connection to the electrical network

Electric heaters operate from single-phase 220 V and three-phase 380 V. Devices more powerful than 5-7 kW are exclusively from 380 V.

Single-phase connection

These are 220 V outlets, found in every home. Flow heaters are powerful, less than 2-2.5 kW are not even found. Therefore, you can plug it into an outlet only with a power of up to 3 kW. The rest require grounding and a power cable with a large cross-section. It is recommended to turn on 4-5 kW devices directly on the panel, on a separate machine.

Three-phase connection

Instantaneous heaters with a power of more than 7 kW are connected to 380 V. Before purchasing a device, you should make sure that such a network is installed in the house. Network requirements, as well as the recommended cable cross-section, are specified in the instructions for each device.These instructions must be followed because this is the only way the manufacturer can guarantee safety and maintenance of the declared characteristics.

Device type

Depending on how the water pressure is generated for further delivery to the consumer, there are non-pressure and pressure heaters. Among flow-through models, most models are non-pressure, but there are also heaters of the second type.

Gravity

Water in such devices circulates and goes to the end user naturally, without additional influence. It comes to the heater under pressure supplied by the water supply system, and then by gravity, due to thoughtful geometry and under its own weight. Such heaters supply water to one intake point and are installed either on the tap or in close proximity to it.

Pressure

Pressure heaters work with multiple intake points. The device can be installed in a utility room, at some distance from the tap or shower. The water pressure is enough to distribute water to not all connected points.

A heating element

There are two options: a tubular heating element or an open coil.

• The heating element is cheaper. But its service life is shorter, because... During operation, it becomes covered with scale. The positive point is that devices with heating elements can be repaired element by element. In inexpensive heaters, it is the heating element. It is made of stainless steel and copper. To protect yourself in case of damage to the integrity of the heating element, it is better to connect the device to the network through an RCD.
• The spiral is an open heating element. It has better heat dissipation. During the heating process, the heating element vibrates, which prevents scale from settling.Consequently, thermal conductivity does not deteriorate due to scale, high efficiency is maintained for the entire service life, which is greater than that of heating elements. Such devices are more expensive and cannot be repaired if they break down.

Power consumption

Instantaneous heaters prepare water for the consumer instantly while it passes through the heat exchanger. To achieve acceptable heating, more power is needed. More power means faster heating, higher possible heating temperature. But the greater the power, the greater the load on the network. The network must be prepared for such tests. This point should be clarified in advance: what load the network in the house is designed for. Billing costs also increase in proportion to capacity.

2-3 kW devices are capable of heating water to warm water at one intake point. A heater of this power will only be used as a standby option in case the hot water supply is turned off, or for use in the country, for example. A 3-5 kW device will heat the water to hot for one point or warm for several. A flow tank, which can serve as the main source of hot water in the house, will consume 6-7 kW or more.

Net power

The useful power of the heaters approximately coincides with the consumed power. There are no links in the structure of the device where it would be lost. The efficiency of flow-through heaters reaches 98-99%.

Maximum water temperature

In the equipment documentation you can find 2 numbers: maximum temperature and maximum heating temperature. And they may not match. The first is the temperature to which the temperature sensors are set; when it is exceeded, overheating protection is triggered. The second depends on the power and shows to what values ​​the device can warm water from a cold tap.You must understand that the manufacturer indicates figures obtained during testing under ideal conditions. Actual values ​​will be lower when heated.

Anti-scale protection

Scale greatly spoils the life of the user and worries the manufacturer. Salts covering the heating element in a thick layer reduce its heat transfer. More energy is consumed, and the water heats up worse. Engineers are struggling with the problem as best they can. Some models have filters for pre-purifying water from hardness salts. In others, the heating element itself is made of materials (or has a coating) to which scale does not “stick” so much. The spiral elements vibrate, preventing salts from settling on themselves.

Control type

Control can be mechanical or electronic. The second type is technically more complex and significantly increases the cost of the device.

Mechanical (hydraulic)

Everything is simple here. The power and degree of heating of the heating element is a fixed value. And the temperature is regulated by changing the flow passing through the heating element per unit time. The less water, i.e. The weaker the pressure, the higher the temperature it will heat up to. The user controls the water temperature by changing the pressure. There are models of flow devices with the ability to select power. Usually in steps, one of several values. But the principle of adjustment itself remains the same.

Electronic

In this case, the process is controlled by a temperature sensor and a controller, which compares the actual heating temperature with the set one, increasing the heating power if necessary. The user sets the value he needs with an accuracy of 0.5-1 degrees, the system itself does everything to ensure this indicator.

Additional functions

Additional options make the operation of heaters more comfortable and safe. Some of them significantly increase the cost of the device.

• Power adjustment.
• Preset heating temperature.
• Indication of temperature, work.
• Self-diagnosis with error indication.
• Protective options: from overheating, starting without water, from scale, RCD.
• Check valve to relieve excess pressure.
• Child lock.

Design Features

The heater, which is a separate independent unit, is selected according to the following criteria:

• Installation method: usually horizontal, but options are possible.
• The eyeliner can be on the top, bottom or on both sides. Installation, based on this, happens above the sink, and below it there are universal models.

Flow-through heaters can also be in the form of a faucet or an attachment to a faucet (attached to the end of a gander). Then you need to pay attention to the connecting diameter of the pipes.

Equipment

The minimum that a buyer should have is the device itself and all the necessary documentation for it. Wall-mounted taps most often come with fittings (shower head and/or faucet). If it is, the manufacturer recommends using it. The declared characteristics are guaranteed only in this case.

Powerful heaters do not always come with a cable. The manufacturer takes this step deliberately. The power cable has to be pulled from the shield; its size can be any. Why pay more for a wire included if it may not be enough?

Sometimes the manufacturer adds to the devices everything necessary for installation, spare gaskets, filters and other consumables.

Features of choosing a gas water heater

The operation of gas equipment is subject to serious safety requirements. Geysers are a source of direct open flame, “fed” by main gas. It is important not only to choose a reliable, safe heater model, but also to make its operation safe.

Coordination and compliance

Only a licensed specialist can install a geyser. The room where the heater will be located must meet the following requirements:

The presence of an inlet of ventilation, an opening window or vent.

Ceiling height from 2.2 m and above, room area from 12 sq.m. In practice, speakers are also installed in smaller rooms, provided that they are not insulated. That is, the kitchen has 8 sq.m. You can install the device if there is no door.

You must contact Gorgaz for approval. To complete the documents, you will need a passport for the equipment, an examination of the condition of the chimney, a technical design and an application.

Chimney equipment

A gas water heater with an open combustion chamber is connected to a separate chimney with natural ventilation. The outlet pipe must be well secured to the wall, without sagging. The material from which it is made needs to be heat-resistant and able to withstand high temperatures. The chimney parameters are specified in the instructions for the heater; they are mandatory. Elements of the chimney that extend outside the room must be insulated.

Connection to the gas main

The rules for connecting the dispenser to the main line are prescribed in SP 62.13330. A special hose must be purchased to connect the heater to the gas pipe: rubber, textile fiber reinforced, sulfone or with a protective metal braid.The distance between the column and the point of insertion into the highway should not exceed 2 m. The work is carried out by a specialist.

A flow-through heater will help solve the problem with hot water in different situations: in case of accidents and prevention at thermal power plants, if there is no other way to heat water in the house. If you have gas, then a geyser is the best option. It is inexpensive, and energy is also inexpensive. An electric heater is more versatile. It is easier to install and no special permission is required. And the variety of models will allow you to choose the best option for any requirements.