10 tips on how to choose a gas water heater (gas water heater) for an apartment

No. 1. Types of gas water heaters: instantaneous and storage

Depending on the device, gas water heaters are divided into two types:

flow-through;
cumulative.

Wall-mounted instantaneous water heaters are popularly called geysers . They are the most widespread. Storage-type devices are practically not used in domestic spaces.

Instantaneous gas water heaters

The geyser does not have a storage tank and is designed for instant heating of water. Inside the unit there is a heat exchanger through which a water tube passes. There is a gas burner under the heat exchanger. As a result of gas combustion, heat is generated, which heats the water passing through the heat exchanger. Exhaust gases are collected in a collector and discharged to the street. This is a basic diagram of how the speaker works, but the operating features of some components may differ from model to model.

In the simplest water heaters light the burner manually; in more expensive models, automatic ignition is provided: as soon as someone turns on the hot water tap, the heater will start working, and turn off when the tap is closed. The water temperature can be regulated either by a simple gearbox or by sophisticated modern electronics.

From your school chemistry course, you must remember that to burn gas, you need oxygen, which is contained in the air. Simple household speakers are equipped with an open combustion chamber and receive air from the room. Combustion products are discharged either through a conventional chimney (an option for private houses) or through a horizontal pipe with a fan providing forced draft. The latter option is used in apartment buildings.

Gas water heaters are equipped with a multi-stage safety system , so they cannot cause any harm, unless, of course, the installation was carried out correctly and you do not violate safety regulations.

Advantages of geysers:

compactness . Even the most powerful unit, which is capable of heating water for several water intake points, will not take up much space and can be very neatly hidden in the kitchen;
economy . Heating water using gas is much cheaper than using electricity. Moreover, in some cases, preparing hot water in this way is even cheaper than its centralized supply;
ability to work with several water intake points. To ensure water heating for 3-4 or more points of water consumption using a flow-through electric heater, you will have to take a device with a power of more than 8 kW, which means that a network with a voltage of 220 V will not be enough - wiring with a three-phase voltage of 380 V will be required. , designed to work with the same number of water intake points, can be connected to ordinary city gas lines - their power will be sufficient.

Some manage to install the speaker even in rooms not connected to a gas pipeline, since there are models that can be powered from a gas cylinder .

Gas water heaters also have disadvantages.:

more complex installation when compared with electric heaters. You can’t do this on your own – you need to involve specialists and obtain special permission;
the gas main must have sufficient capacity. As a rule, this is not a problem - in most apartments there will be enough power. Where only a gas stove is installed, the network power may be insufficient;
combustion products must be removed somewhere , so the construction of a chimney will be required. It will be easiest for residents of private houses and the top floors. The rest will have to build a chimney along the outer wall of the house or install a turbine column and punch a hole in the wall;
danger caused by improper use. To minimize risks, purchase a speaker with automatic protection. By the way, all modern devices and most of those released decades ago are equipped with the necessary security systems. In addition, it is important to ensure the flow of the required amount of fresh air: for 1 unit of volume of burned gas, 10 units of volume of supply air should be supplied.

Storage gas water heaters

Such devices are similar in design to electric boilers . The only difference lies in the source of heat: instead of electricity, gas is used here. The basis of such a unit is a storage tank where a supply of hot water is stored. A tube passes through the tank - this is a heat exchanger, inside which hot gas combustion products move. A burner is installed at the bottom of the tube, where the combustion process takes place. So that the gases, moving upward, have time to give up all their heat, the heat exchanger receives a complex design with dividers.

Tank volume ranges from 50-500 liters , but the most widespread models are 100 and 200 liters. For a family of 2-3 people, a unit with a volume of 80-150 liters is suitable. The tank receives reliable thermal insulation, so a once heated supply of water can be stored for a relatively long time - there is no need to turn on the device every time.

The main advantages of storage gas water heaters include:

efficiency;
availability of a constant supply of hot water;
possibility of installation where the gas supply line is weak;
ability to work with a large number of water intake points.

Such units take up a lot of space , but this is not their main drawback. They are quite expensive , they are not widespread in our area, so their range is extremely modest. Most people opt for instantaneous heaters or double-circuit boilers. Due to the low popularity of this type of unit, we will focus our attention on how to choose a geyser - a device with a flow-through type of heating.

What parameters should you use when choosing?

Before choosing the best geyser option for an apartment or private house, you need to decide on the volume of water that comes from the tap. You need to determine how many liters per minute flows out of the tap. To do this, the easiest way is to use a water meter if it is installed on a pipe in the apartment.

To do this, you need to record the readings on the meter. Next, you need to note the time and open the tap at full power, draining the water for exactly one minute. After this, you need to close the tap and record the readings on the meter again. Then it is necessary to subtract the primary indicators from the final indicators. The resulting number will help you choose the model you need in terms of performance.

If the resulting value is less than 10 liters, then there is no point in buying models with a capacity of 13-15 or more liters. If the house has old pipes in which the pressure often decreases, then a model with a reduced threshold is needed, otherwise the water heater will turn off when the water pressure decreases.

For regulation of water and gas supply

According to the method of controlling the water temperature, geysers are divided into manual and automatic. Models with a manual setting method are cheaper than models with an automatic one.

Manual regulation implies the presence of two valves on the body of the geyser. An increase in gas supply leads to more intense combustion and heating of water. If increasing the gas supply is not enough for optimal heating, it is possible to reduce the pressure of water entering the column.

The disadvantage of these models is the lack of flame modulation in the heating pad. When two water intake points are used simultaneously, the water temperature will change. This is uncomfortable, especially if a person is taking a bath at this time

Models with electronic ignition maintain the temperature set by the user. This is achieved by modulating the flame in the burner, depending on the pressure of the water used. The maximum deviation from the set temperature range is from 1 to 3 degrees Celsius.

It is very important that the water is heated smoothly when turned on, without sudden jumps. If the burner first heats up very much and then lowers the temperature, you will have to wait for the water temperature to normalize. This increases water consumption.

Guidelines for gas ignition method

Speakers that are lit by a piezoelectric element are more reliable than their automatic counterparts. Models with a piezoelectric element allow you to manually control the gas supply to the column, unlike automatic igniters. These models have the ability to leave the flame on the pilot burner in normal mode.

This allows you to avoid re-igniting the column each time you use it. The flame is maintained in the pilot burner and ignites the main heating element when the sensor detects water flow.

The location of the ignition button differs in speakers from different manufacturers. In some models, in addition to pressing the button, you have to move the slider

Water heaters that receive a spark from a battery-powered igniter cannot be installed in rooms with high humidity. Condensation forms inside the plastic battery case. Over time, metal parts become damp and need to be completely replaced.

It is advisable to change the batteries themselves as needed. With constant use of the device, the frequency of replacement increases. It is better to use high-quality batteries, they last for a year or more

Columns fired by a hydrogenerator are noisy. They make a small whistle, reminiscent of the wind. In expensive models, this problem is solved by soundproofing the case. These water heaters also turn on when the hot tap opens. Visually, the hydrogenerator does not stand out, as it is installed in the water heater housing.

According to the method of removal of combustion products

Flow-through gas heaters require combustion products to be removed. The safest way to remove carbon monoxide is a chimney with a pipe outlet to the street.

The more powerful the geyser model, the wider the diameter of the chimney pipe. If a water heater is purchased to replace a failed device, then you need to measure the diameter of the installed pipe so that there is no need to dismantle the old one.

On the Russian market you can find models of instantaneous gas water heaters without a chimney. Placing them in a confined space is hazardous to health. It is highly undesirable to install them in rooms without ventilation holes in the walls.

Their installation in the bathroom is prohibited, as there is a risk of carbon monoxide poisoning. A distinctive feature of these models is low power. Our recommended article will introduce you to the rules for installing speakers.

According to the method of oxygen supply

In budget models of geysers there is no bottom cover on the body, or there are ventilation holes on the body of the device.

The disadvantage of this device is that combustion waste partially enters the apartment through these openings. In addition to carbon monoxide, propane may leak

In expensive models, a different oxygen supply device is used. It is a pipe that comes out of the column at its bottom. Additionally, the speaker body is closed with a bottom and top cover, which prevents carbon dioxide from entering the apartment. The effect is achieved through convection.

How to determine the required power?

Low power water heaters (17-19 kW) are designed for systems with low water pressure and serving only one point of consumption. They are installed in houses with old pipes.

There is no point in purchasing a more powerful column if the system flows less than 10 liters of water per minute. It's a waste of money

If the apartment has good water pressure (10-14 liters per minute), then you can choose a gas water heater for two hot water supply points. Medium power water heaters (20-24 kW) may react poorly when the pressure in the system decreases if it is not enough to turn on the automatic gas ignition system.

High power geysers (28-31 kW) are not intended for apartments. They are used in private country houses. Some manufacturers produce modular columns that are specifically designed to work as a single water heating system.

No. 2. Gas water heater power

The power of the geyser is indicated in kW. It is directly related to the performance of the equipment and indicates how many liters of water per minute the column can heat. It is worth noting that the best geyser is not necessarily the most powerful device. It all depends on how many people live in the apartment, and how many of them can use hot water at the same time (or how many hot water faucets are installed). It is believed that one mixer is capable of flowing 6-7 l/min. It is enough to multiply this parameter by the number of taps, add a small margin and get the result. The power is indicated either on the column itself or in the technical documentation for it. For example, a column with a power of 23-24 kW allows you to heat about 14 liters of water per minute to a temperature of about 25 degrees.

Based on power, speakers are divided into several types:

17-20 kW – minimum power sufficient to supply one water intake point, i.e. you can either take a comfortable shower or wash the dishes - it will be difficult to do both at the same time. Their productivity is 9-10 l/min, no more. Option for a small family or one person;
20-26 kW - medium power columns, heat 15-20 l/min and are suitable for heating water to a comfortable temperature for 2-3 points of water consumption. The most popular option;
more than 26 kW - powerful units for large families and private homes.

In pursuit of power, do not lose common sense and do not forget to take into account the water pressure indicator . There is no point in buying a column designed to heat 25 liters of water per minute if the water supply network is not capable of providing such pressure.

Ratings of the best speakers

All categories contain the top three models with similar characteristics. The rating of geysers, the most reliable in operation, is presented in the article. The information we collect and systematize is based on the opinions of users.

The comparison of water heaters is made based on three criteria:

For one water supply point.
For two water supply points.
Original design.

In the rating of geysers, places are distributed according to the deterioration of consumer properties, according to user reviews.

The best speakers for one water supply point

This rating includes models with prices up to 20,000 rubles. All models are equipped with a gas leakage protection function. They also additionally have a frost protection mode, which prevents damage to the device during a long period of absence of heating.

Low-power unit – Mora Vega 10

The model has low power and is intended for installation in an apartment. The heat exchanger is made of copper, with sufficient wall thickness. European build quality guarantees a long service life.

When a breakdown occurs, it is difficult to obtain spare parts, but they rarely occur. The device operates at a pressure of 0.20. The power of this model is 17.3 kW

Ignition occurs automatically from batteries. The gas supply is adjusted mechanically until the desired temperature is achieved. Chimney diameter – 110 mm. The model is produced in the Czech Republic.

Equipment for a small family Bosch W 10 KB

The water heater has low power and is intended for installation in an apartment. The heat exchanger is made of copper, with sufficient wall thickness.

Recently, the company has been reducing the cost of production, which affects the quality of parts. The device operates at a pressure of 0.20. The power of this model is 17.4 kW

Ignition occurs automatically from batteries. The gas supply is adjusted mechanically until the desired temperature is achieved. Chimney diameter – 110 mm. The model is produced in Portugal.

The undisputed leader – Gorenje GWH 10 NNBW

This model has low power and is intended for installation in an apartment. The heat exchanger is made of copper, with sufficient wall thickness.

Recently, the company has been reducing the cost of production, which affects the quality of parts. The heat exchanger tubes have a small diameter, so it is necessary to install filtration at the water inlet to the column

The device operates at a pressure of 0.20. The power of this model is 20 kW. Ignition occurs automatically using batteries. The gas supply is adjusted mechanically until the desired temperature is obtained on the screen. Chimney diameter 110 mm. The model is produced in Portugal.

The best speakers for two water supply points

All presented models are in the price category up to 25,000 rubles, and also work perfectly on natural and liquefied gas. All water heaters are equipped with gas leakage protection. There is an automatic system that turns off the gas supply when the device overheats.

You will learn about why, in addition to overheating, the column goes out and what should be done in this case, from the article we have proposed.

Medium power equipment Mora Vega 13

This water heater has medium power and is designed for installation in apartments and private houses. Can run on liquefied gas. The heat exchanger is made of copper, with sufficient wall thickness.

European build quality guarantees a long service life. When a breakdown occurs, it is difficult to obtain spare parts, but they rarely occur. The device operates at a pressure of 0.30. The power of this model is 22.60 kW

Ignition occurs automatically, using batteries, but there are options with piezo ignition. The gas supply is adjusted mechanically until the desired temperature is achieved. Chimney diameter – 113 mm. The model is produced in the Czech Republic.

Budget representative – Bosch WRD 13-2G

The water heater has an average power and is intended for installation in apartments and private houses. The heat exchanger is made of copper, with sufficient wall thickness.

Recently, the company has been reducing the cost of production, which affects the quality of parts. The model does not have a top or bottom cover. The device operates at a pressure of 0.35. The power of this model is 22.60 kW

Ignition occurs automatically, using batteries. The gas supply is adjusted mechanically until the desired temperature is achieved. Chimney diameter – 113 mm. The model is produced in Portugal.

Popular option – Beretta Idrabagno Aqua 14i

This model has medium power and is intended for installation in apartments and private houses. The heat exchanger is made of copper, with sufficient wall thickness.

A water filter is included in the kit. The device operates at a pressure of 0.20. The power of this model is 21.80 kW (+)

Ignition occurs from batteries. The gas supply is adjusted mechanically until the desired temperature is achieved. Chimney diameter 113 mm. The model is made in Italy.

Speakers with the most original design

In addition to technical characteristics, consumers often choose equipment based on appearance. It is important for buyers how the device will fit into the interior of the room where it is planned to be installed.

This list contains models with the most striking and memorable designs.

Zanussi GWH 10 with interesting decor

This model has more than 10 types of front panel designs covered with a thin layer of glass. Regardless of design, all speakers have the same technical characteristics.

This is due to the low cost of the water heater. The warranty period is 2 years. The device operates at a pressure of 0.15. The power of this model is 18.5 kW. The water heater copes with providing one water intake point

The water heater burner is ignited by batteries. The gas supply is adjusted mechanically until the desired temperature is obtained on the screen. Chimney diameter – 110 mm. The manufacturer is located in Italy, and assembly takes place in China.

Oasis 20 VG/ OG/ EG/ MG/ ZG

This model has 5 types of front panel design. Regardless of design, all speakers have the same technical characteristics. The heat exchanger is made of copper, but the wall thickness is small.

The water heater operates for no more than three years and often breaks down before the end of the warranty period. The device operates at a pressure of 0.15 and copes with providing one water intake point. The power of this model is 20 kW

The water heater burner is ignited by batteries. The gas supply is adjusted mechanically until the desired temperature is obtained on the screen. Chimney diameter -110 mm. The manufacturer is located in Germany, and assembly takes place in China.

Custom design Atlan 1-10 LT

This model has 15 types of front panel designs. Regardless of design, all speakers have the same technical characteristics. The heat exchanger is made of copper, but the wall thickness is small.

The quality of the water heater is very low. Its service life often does not exceed the warranty. The device operates at a pressure of 0.20. The power of this model is 20 kW and copes with providing one water intake point (+)

No. 3. Gas water heater ignition type

The type of ignition is one of the most important parameters of the column. It determines how often you will approach the device, as well as how safe and economical the process of generating a flame will be. types of ignition can be used in geysers :

manual type of ignition is practically not used in currently produced columns - this method has become a legend, since it was not very safe and extremely inconvenient, especially if the unit was located in a hard-to-reach place. There is no point in dwelling in detail on manual ignition;
piezo ignition - an improved version of the manual method. Here the spark comes not from a match, but when a special button is pressed. With its help it lights up pilot burner (as in the case of manual ignition). It is always on when in standby mode. When someone turns on the hot water, the main burner lights up, and after turning off the hot water, it goes out. Due to the fact that the pilot burner always maintains the flame, It’s impossible to call such speakers economical. But devices with such ignition are inexpensive and are completely non-volatile – for areas with frequent power outages, this is the best option. In fairness, it is worth noting that the financial losses from the constant burning of the pilot burner are not particularly significant, especially in modern columns;
electric ignition. The supply of gas and the start of its combustion occurs only when someone in the apartment turns on the hot water valve. Until this moment, gas is not consumed. When the tap is closed, access to the gas is blocked by a special valve, and combustion does not occur. That is why such columns are considered the most economical and modern, and the absence of the need to ignite the flame (even if this is done without a match, but only with a button) is great plus in terms of ease of use. Minus - higher price such speakers are also dependent on the availability of electricity, but in some models we managed to get rid of the last disadvantage.

Columns with electric ignition can be divided into two types: volatile and non-volatile. In volatile ones, the ignition system is connected to the household electrical network. If you live in a city apartment and do not experience any special problems with the supply of electricity, then this is quite a good option. In non-volatile electric speakers, ignition can be implemented in several ways:

using batteries. It is advisable to use powerful alkaline batteries and change them regularly, since a decrease in supply voltage can cause characteristic popping noises when starting the burner. As a rule, the charge level is displayed on the display. In some speakers, batteries are used as a backup ignition system;
hydrodynamic ignition. Energy sufficient for ignition is obtained by operating a small hydrogenerator. As soon as you turn on the hot water tap, the turbine begins to rotate and generate energy for ignition, which takes a matter of seconds. Convenient and practical, but dispensers with a hydrogen generator are not cheap, and if something happens, repairs will be difficult.

Ignition

According to the type of ignition, all gas appliances are divided into 3 types:

Manual - lit with matches. Simple, but unsafe. It is rarely used in modern models.
Semi-automatic - the burner lights up from a spark from a piezoelectric element, which is obtained after pressing the button. The most popular, but uneconomical type of ignition for a column. The wick either burns all day, or you have to relight the unit every time.
Electric - the built-in electronics independently ignite and extinguish the column; the starting signal is the opening or closing of the tap. They operate from a power supply (from 220V), batteries or a hydrogenerator. Models with such a system cost more, but they are more comfortable to use. The disadvantages of electric ignition include dependence on electricity (batteries); starting from a hydrogenerator allows you to solve this problem.

The cost of a device with a hydrogenerator is higher than the cost of other geysers. Repairing these units will also be expensive.

When choosing a dispenser igniter system for apartments or private houses, you should be guided by the principle of ease of use and the price of the device.

Geyser electronic unit

No. 4. Combustion chamber type

To choose a gas water heater, you need to pay attention to a lot of technical details, and the type of combustion chamber is one of the most important points. There are only two options here:

open combustion chamber;
closed combustion chamber.

Open chamber speakers are the simplest and cheapest. They use air from the room in which the device hangs to burn gas. The intake is carried out through the holes at the bottom of the column. Such units are installed in kitchens or in separate utility rooms (an excellent option for owners of private houses). Combustion products are removed through the chimney due to natural draft. These types of devices are characterized by minimal noise during operation, but are more suitable for private homes, as they require connection to a chimney. In addition, the room where the device will be installed must be provided with adequate ventilation.

Columns with a closed combustion chamber receive air from the street. The chimney in such units is horizontal, goes out through the wall and is represented by a coaxial pipe (pipe in a pipe). Through the inner part of the pipe, combustion products are removed to the street using a fan, and air is supplied to the column through the outer pipe. You can install such a unit in any room, it is safer, but you will have to pay more for such a speaker, and the operation of the fan depends on the availability of electricity and is accompanied by slight noise.

Chimneys

There are gas water heaters:

with an atmospheric chimney - a classic option, used only in apartment buildings and private buildings with an equipped stationary vertical chimney;
chimneyless - air supply and gases are removed through a coaxial horizontal chimney (pipe).

The latter option is suitable for both apartments and private houses.

Regardless of the type of chimney chosen, the room in which the equipment will be installed must have good ventilation.

We recommend reading! How to easily clean a gas water heater from contaminants - the best ways.

No. 5. Removal of combustion products

We have already partially discussed this issue above, but now we will dwell in a little more detail. Depending on the type of carbon monoxide removal, there are:

classic, with chimney . Great for homes that already have a chimney. Otherwise, it will have to be built separately. For residents of apartment buildings, this option is in most cases impossible to implement;
chimneyless, or turbine . Combustion products are discharged through a pipe, a hole for which is made in the wall. Combustion products are drawn out due to the operation of the fan.

The room in which the speaker is located must be well ventilated. If plastic windows were installed, you will have to equip them with a ventilation valve.

Design and mechanism of operation of a gas water heater

Before we explore how to choose a gas water heater for a summer house or apartment, let’s consider the distinctive features of an instantaneous water heater. These devices differ in that the water is directly heated in a copper heat exchanger by a burner flame. The water temperature is maintained by changing the intensity of the flame.

The main modular elements include:

A power supply that coordinates the operation of all nodes and provides a multi-stage control system.
Gas-water control device for safe and optimal operation of the device in a wide power range.
Modular burner.
Display for indicating the temperature of the heated liquid.
A heat exchanger designed to provide heat transfer from heated gases to running water.
Chimney with draft sensor.

Two pipelines are connected to the body of the water heater: one supplies cold water, the other, respectively, gas. The lower part of the device is equipped with the main and pilot burners. When you open a water tap, gas flows through the valve. It causes fire from the pilot burner to the main burner. The water is thus heated by passing through a spiral-shaped tube located in the heat exchanger. In this case, emissions of harmful substances evaporate through the chimney, and hot liquid enters the tap. Automation of processes in the column allows you to quickly obtain heated water.

No. 6. Column heat exchanger type

The durability and wear resistance of the column is directly related to the material used to make the heat exchanger:

steel heat exchanger It is inexpensive, weighs decently, and is relatively reliable in operation. It is better to choose a model where the heat exchanger is made of stainless steel;
highly purified copper resembles steel in its basic properties, but has higher heat transfer, so it will be possible to extract the maximum benefit from each cubic meter of gas;
ordinary copper heats up unevenly, due to impurities. That is why many manufacturers cover the heat exchanger with heat-resistant paint, but it can only hold back destructive processes in the heat exchanger for a while.

It turns out that stainless steel and purified copper are the preferred options.

Heat exchanger

When choosing a column, you should not skimp on the quality of the heat exchanger. The main attention is paid to the material from which this part is made. The durability, reliability, and operating efficiency of the selected device will depend on it.

All heat exchangers have a similar design and are made of three materials - steel, plain or highly purified copper.

Steel heat exchangers have a lower efficiency coefficient compared to copper. They cost less than copper ones, but weigh more. Preference should be given to stainless steel heat exchangers. Their service life is longer than that of conventional steel models.

Steel heat exchanger for atmospheric column

A heat exchanger made of simple copper has a good level of efficiency, but due to the presence of various impurities in the metal, the water is heated unevenly. To extend the service life of this part and eliminate heating problems, manufacturers use heat-resistant paint.

Products made from highly purified copper have a high efficiency and good heat transfer. They weigh little and will last a long time.

The choice is obvious - for private houses and apartments it is better to take speakers with a heat exchanger made of highly purified copper. If you need to save money, you can choose stainless steel or just copper.

No. 7. Water and gas pressure

For each column, the data sheet specifies two main water pressure parameters: the minimum at which the unit will turn on, and the maximum - the pressure that the heat exchanger can withstand without losing its integrity. It is advisable to clarify all the parameters of your water supply network before choosing a gas water heater. For city apartments where water heaters are used (and these are mostly Khrushchev and Stalin buildings, i.e. old housing stock with worn-out communications), it is better to choose a unit that can operate with minimal water pressure . Therefore, pay attention to those devices that can heat water at a pressure of as low as 0.15 bar.

High pressure can be destructive to the column, and water hammer, alas, is not uncommon. Buy units that can withstand a short-term increase in network pressure up to 11-12 bar.

Also, do not forget to check what gas pressure the dispenser can operate with. In domestic gas pipelines, the gas pressure is lower than in European ones (13 mbar versus 20 mbar), so when buying a dispenser from a European manufacturer, you need to inquire for which market it was produced, and whether it has a gas reducer installed in order to maintain constant pressure.

Ariston Fast R ONM 14

Thermal power - 20 kW Heating volume - 14 l/min Input pressure - from 0.2 atm to 10 atm Control type - mechanical Ignition type - electric with open chamber

A compact and convenient chimney-type gas heater, which combines high thermal power and good performance, due to which it can be equally successfully used both in apartments and in private houses. The diameter of the connection to the chimney system is 13 cm. The heat exchanger is made of copper - an optimally resistant thermal material.

No. 8. Burner type and power modulation

Burners in geysers can be of two types:

with constant power . The simplest option, the main advantage of which is its low cost. When changing the water pressure, you will have to manually change the temperature on the column, and you can get tortured. If you do not change the temperature, the water can flow at a scalding temperature. Let's say your neighbor turned on the water or someone flushed the toilet. The water pressure has decreased, but the flame strength has remained the same, so the reduced amount of water that will flow through the heat exchanger will heat up to uncomfortably high temperatures;
with modulated power . Everything here is much more modern. You just need to enter the desired water temperature, and the flame power will be adjusted depending on the water pressure. This is the preferred option. Of course, water temperature control is present on all water dispensers, but conventional devices cannot adapt to changes in gas pressure and pressure, and units with modulated power will produce water with clearly required parameters under almost any conditions. Such speakers are more expensive, but they are not only more comfortable to use, but also more economical.

Of course, the preferred option would be a burner with modulating power.

Distinctive features

The purpose of the geyser is to heat water . The characteristics of the device determine how quickly and in what quantity the water can heat up. In order not to make a mistake in choosing a device, you should understand its structure.

The first columns with an open combustion chamber consist of a metal body, a gas burner with an igniter, a heat exchanger, an automatic gas valve with a combustion intensity regulator, a mechanical water unit with a safety valve, an ignition system, a diffuser for connecting the chimney, as well as pipes for supplying water and gas, located at the bottom of the structure.

A device with a closed gas combustion chamber has a similar structure, but has a number of differences:

the classic burner has been replaced by a stepped or modulating burner, which changes the flame intensity automatically;
air is forcedly supplied using a fan;
the flame is ignited automatically through the electrical network or a hydrogenerator;
after heating, the water temperature is maintained due to the presence of a special sensor connected to the controller.

No. 9. Gas water heater security system

Many people are still afraid to use geysers. Data on real estate sales show that apartments with similar equipment are 15% cheaper than similar ones, but without gas water heaters, and 70% of buyers do not even consider buying such housing. If you approach the selection and operation of a gas water heater wisely, then all risks can be minimized. It is important that the column automatically turns off when there is no supply of water, gas or the necessary draft, and does not allow carbon monoxide poisoning. To achieve this, modern units are literally packed with all kinds of security systems:

the ionization sensor turns off the device when the gas supply is stopped;
The combustion sensor also turns off the column if the flame goes out. Ionization and combustion sensors can be used in pairs;
the draft detector will not allow the heater to be turned on or will turn it off if there is no draft in the chimney, protecting the home from filling with carbon monoxide;
the flow detector ensures the normal functioning of the column and turns it on when someone turns on the hot water tap;
The overheating sensor turns off the column if the water temperature reaches a threshold value. Protects the heat exchanger from rupture and a person from burns;
a low water pressure detector will not allow the water heater to turn on if the pressure in the water supply is insufficient, thereby protecting the heat exchanger from burning out;
an emergency pressure relief valve protects the column from increased water pressure;
A cold and hot water temperature sensor is necessary to correctly set the temperature of the water coming out of the tap.

Neva 4508

Thermal power - 15.4 kW Heating volume - 8 l/min Input pressure - not specified Control type - mechanical Ignition type - electric with open chamber A simple and convenient gas water heater of average productivity, designed for a standard apartment with two or three water supply points. Equipped with automatic flame adjustment and can operate on liquefied fuel. On the front panel there is an information display reflecting operating parameters and temperature transmitted from the built-in thermometer.

No. 10. The best manufacturers of geysers

It is difficult to argue with the well-known fact that famous companies produce high-quality, reliable and durable equipment. When safety and comfort are at stake, it is better to overpay a little, but sleep peacefully, so we recommend paying attention to gas water heaters from the following manufacturers:

Bosch, Germany - high-quality reliable equipment with the ability to maintain water temperature at variable pressure. There are models of varying power;
Beretta , Italy - wide range of geysers. Each model is presented in a whole range of capacities. The manufacturer also pays attention to design, so for those for whom the main thing is not to spoil the interior, these units are recommended for use;
Zanussi , Italy - reliable and inexpensive equipment, most models are made in a classic style. Main advantages: economical gas consumption, low noise, copper heat exchanger, work with networks with low water pressure;
Ariston , Italy - functional speakers at affordable prices. All components that are subject to increased loads are made of composite materials that are extremely resistant to corrosion;
MORA-TOP , Czech Republic - a manufacturer with extensive experience, produces very high-quality speakers with reliable and durable heat exchangers. All stages of assembly are carried out in Europe, all parts are made in Europe, so you can trust these speakers. In addition, each model, both the most budgetary and the most expensive, uses a multi-stage security system;
Vaillant, Germany - produces productive, unpretentious speakers that are great for use in our area;
Electrolux , Sweden - speakers with copper heat exchangers, excellent functionality and affordable prices;
Ladogaz , Russia - domestically produced speakers, which are manufactured using European technologies and are inexpensive. The models are quite economical and maximally adapted to our operating conditions;
NEVA , Russia - a St. Petersburg company that has been producing geysers since the 90s, working to improve their design and constantly expand the model range. The speakers can work with minimal water and gas pressure, so in some cases they will be indispensable.

Finally, we note that there is no need to be afraid of geysers - you just need to learn how to choose them correctly and ensure compliance with the operating rules.

The article was written for the site.

Tags:Hot water, Heating boiler

Bosch WTD 18

Thermal power - 31.6 kW Heating volume - 12 l/min Input pressure - up to 12 atm Control type - electronic Ignition type - electric with open chamber

Convenient and modern gas water heater with average performance. Among the features of the model are the presence of an information display, automatic adjustment of operating parameters, electronic control of water temperature and the presence of a gas control function. Users cited ease of control, reliable operation of the security system, and the ability to operate on liquefied gas cylinders as advantages.

The best geysers with connection to bottled gas

In the absence of a centralized gas supply, dispensers running on liquefied gas are used to supply hot water.

Bosch WR10 - 2P23 - operates at minimum water pressure

4.9

★★★★★

editorial assessment

90%

buyers recommend this product

See review▶

All Bosch geysers can be converted by specialists to operate on liquefied natural gas - this will not affect the reliability of the equipment.

The copper heat exchanger is designed for fifteen years of operation, and all fittings of the water system are made of glass fiber reinforced polyamide and are not subject to corrosion.

Advantages:

Stable operation at low pressure in the water supply (from 0.1 bar);
Smooth temperature adjustment;
Fast water heating;
Quiet operation;
Compact sizes.

Flaws:

Only specialists can convert the dispenser to LNG.

WR10 is suitable for a summer cottage or housing in the outback where there is no centralized gas supply. But it is designed for low water consumption.