Choosing a gas water heater for heating water. Turbocharged gas water heater with a closed combustion chamber Gas hot water water heaters with a closed combustion chamber

A geyser will not only allow you to use hot water from several sources in one house and not depend on problems or failures in the central system.

Flow-through gas ones most often have small dimensions; they are an ideal choice for a small apartment. The device is connected directly to the cold water supply system and runs on both natural and liquefied gas.

The principle of operation of the column is very simple: water enters the heat exchanger, where it is heated by the combustion gas, and is immediately supplied to the mixer.

A storage geyser can hold a large amount of liquid, so it requires a lot of space. The heater heats a certain amount of water in the container and maintains the temperature for a long time.

If the water cools down, the column automatically heats it up to the desired temperature. The water container is well insulated, so the water stays hot longer.

Depending on your needs, you can choose a gas water heater with a liquid tank of 50 liters or more.

Power. Depending on how much liquid is heated, a geyser can have a power from 6 to 30 kW.
Ignition type– can be automatic or semi-automatic. The automatic type of ignition is triggered when the water supply is turned on or when the water in the container has cooled down.

The semi-automatic type of speakers works only if you press the piezo ignition button. Such a device increases gas consumption, since the pilot flame must always be burning.

Burner type– can be with constant and modulated power. Devices with constant power are less convenient in places where the water pressure and, accordingly, the heating temperature often change.

A burner with modulating power automatically adjusts to the water pressure and maintains the initially set temperature.

Type of combustion products removal. A chimney column is installed if the corrugated hose can be routed into an existing chimney.

Turbocharged devices are less popular because there is a risk of the outlet paths freezing at low temperatures. In this case, it is necessary to drain the accumulated water frequently to prevent the heat exchanger from exploding.

Safety– a geyser is a dangerous device, so you need to pay attention to the presence of protective sensors and relays.

Dimensions– if this point does not matter, you can select a column, taking into account only the main characteristics and requirements. If the room does not allow you to install a large storage column, you can choose the most compact flow-through one.
Form– if you will hide the device in a kitchen unit, it is better to choose a square shape of the required size.

The best gas water heater with a closed combustion chamber

Zanussi GWH 10 Fonte
Zanussi GWH 10 Fonte can be installed in a private or multi-storey building. The device was created using modern technologies and materials.

Characteristics:

The design is made in a classic style.
There are models with additional patterned glass on the front panel; this solution allows you to gently fit the device into any design.
The Zanussi GWH 10 Fonte geyser operates silently, consumes gas and water economically, and is equipped with a multi-level security system.

Pros:

the Zanussi water heater is equipped with electronic ignition, which uses two standard batteries;
the presence of an LED display that reflects the temperature of the liquid upon exit;
the device operates smoothly at low pressure and supplies water under even pressure;
the burner and heat exchanger are made of stainless steel, which will significantly extend the service life;
closed combustion chamber;
low cost.

Minuses:

The batteries in your electronic lighter need to be changed frequently.

The best Russian-made geyser

Ladogaz VPG 10 E is created using innovative materials and technologies that save gas and water costs.

Characteristics:

The water heater has classic parameters and is made using modern materials.
The column is of the flow-through type, so gas and water consumption is significantly saved.
The high safety of the water heater is ensured by the fact that the burner only fires when water is used.

Pros:

The gas water heater operates stably even at low pressure.
It has a special inner layer that protects against the formation of precipitation and scale.
The heat exchanger is made of high-quality copper, which affects the heating rate and water quality.
The presence of several levels of security system: chimney draft sensor, overheating sensor and flame sensor.
Automatic ignition.

Minuses:

No display.
Temperature changes are possible.

The best geyser with automatic water temperature control

Neva 4510-M
Geyser of a domestic manufacturer Neva 4510-M has many advantages, the main one of which is its affordable price.

Characteristics:

The device is made in a classic style and has no special frills.
The speaker has compact parameters, so it can be installed in a small apartment or in a private house.
The column operates quietly and uniformly supplies liquid at the desired temperature even with sudden pressure changes.

Pros:

The water heating column starts at a liquid pressure of 0.15 bar.
Availability of two-stage flame modulation.
The presence of an ionization sensor, due to which the gas supply stops when the burner goes out.
Compact dimensions allow the speaker to be installed in a small bathroom or kitchen.
Quite low cost.

Minuses:

The water heater is not equipped with smooth flame modulation, which will not allow the use of this device at two water supply points.
The column has a power of 17.9 kW, which allows you to heat only 9 liters per minute.

The best geyser for an apartment

Mora Top Vega 10
Mora Top Vega 10 is a fairly popular water heating device on the Russian market.

Characteristics:

The device heats more than 10 liters per minute.
The geyser weighs about 2.5 kilograms.
The device is designed for one water intake, so it can be used separately in the kitchen or bathroom.

Pros:

Use of high quality spare parts and materials in production.
An effective and multi-level security system, or more precisely, protection against starting without water supply and against backdraft in the chimney, the presence of fuses against water overheating.
Robust and practical design of the device.
Attractive appearance.
The heat exchanger is made of copper with an efficiency of up to 93%.

Minuses:

High price.
Designed for one water intake.
This model is sometimes difficult to find in stores due to the fact that the product is instantly sold out from stores.

The best geyser with turbo hood

Hyundai H-GW2
Gas water heater Hyundai H-GW2 made of durable and high-quality materials, which positively affects its operation and extends its service life. The small and compact device is easily installed in a small kitchen or bathroom.

Characteristics:

The water heater has a classic appearance and weighs about 8 kilograms.
The device is made of durable, high-quality and resistant materials, which allows it to be used in any conditions.
The column has an automatic ignition system, which has a positive effect on its performance and safety.

Pros:

The presence of an LED display allows you to control the outlet temperature, as well as recognize errors and breakdowns when they occur.
The device is equipped with a 4D-quard security system.

Lack of draft sensors in the turbo exhaust shut off the gas in case of danger and also prevent reverse draft. The flow sensor regulates the presence and level of liquid in the water heater.

The ionization sensor shuts off the gas in the absence of flame and in case of overheating.

Affordable price.

Minuses:

Cannot operate on bottled gas;
Requires frequent battery replacement;
Designed for one water intake.

The best geyser for low water pressure

Ariston Fast Evo 11C
Ariston Fast Evo 11C refers to instantaneous water heaters running on natural gas. The water heater has compact parameters and operates at a pressure of 0.10 bar.

Characteristics:

The geyser is triggered by automatic ignition, which is connected to the mains.
This water heater can be installed in an apartment or in a country house, since its productivity is 11 liters per minute, the water heats up to 65-70 degrees.

Pros:

The main advantages of this model include its power, which is 19 kW.
The presence of an LED display allows you to find out the exact temperature of the outlet liquid, as well as correct a breakdown or error thanks to the appearance of special codes on the screen.
The safety system includes a flame sensor, overheat protection and a draft sensor.

Minuses:

One of the disadvantages is incorrect indicators on the display, since the set temperature may not correspond to the temperature of the exiting liquid.
This model is designed for only one water intake.

The best geyser for a private home

Bosch WRD 13-2G
In terms of versatility Bosch WRD 13-2G It is considered one of the best due to its fairly high power and performance.

Characteristics:

This model can be used to supply two water intakes.
The manufacturer offers the possibility of replacing the burner for liquefied gas.
Compact parameters, classic shape and color allow you not to hide the water heater without spoiling the overall design of the room.

Pros:

It has a built-in hydrodynamic generator, thanks to which automatic ignition is carried out.
The outlet temperature corresponds to the readings on the LCD display.
When the water pressure changes, the water heater maintains the set temperature.
The copper heat exchanger prevents heat loss and also significantly extends the service life.

Minuses:

The lowest pressure this model can operate with is 0.35 bar.
High price.

The best gas water heater for bottled gas

Mora Vega 13
Geyser Mora Vega 13 can supply hot water to two points.

Characteristics:

The model is presented in several variations, which allows you to choose the shape and size that best fits your design and space.
It runs on natural and bottled gas, which allows it to be used in apartments and private houses.

Pros:

A high-quality heat exchanger supplies water without changing its temperature parameters.
The diameter of the outlet pipe can be connected to the chimney with minimal neck parameters.

Minuses:

Very high price.
It is difficult to find spare parts in case of breakdown.

The best gas water heater with piezo ignition

Bosch WR 10-2P
Gas water heater Bosch WR 10-2P has a lot of advantages regarding its performance and external characteristics.

Characteristics:

The geyser has a classic shape and small parameters, making it almost invisible in the room.
This model can be easily converted from natural gas to liquefied gas, so it is practical both in a city apartment and in a rural house.

Pros:

Silent operation and compact parameters.
This model can operate even with very low water pressure.
Automatic ignition turns on when the tap is opened and turns off when the flow is turned off.
Piezo ignition allows you to avoid purchasing an endless number of batteries, which can fail at the most inopportune moment.
The security system includes a fire intensity regulator and a temperature sensor to prevent overheating.

Minuses:

The disadvantages of this model include sensitivity to liquid quality.
In the event of a breakdown, spare parts are very difficult to find, as is a specialized service center.
To clean the water heater, you need to completely disassemble the device.

The best gas water heater, semi-automatic

Bosch Therm 2000
Gas instantaneous water heater Bosch Therm 2000 has a lot of advantages, including the ability to easily switch to liquefied gas.
Characteristics:

The classic shape, small parameters and soft shades allow the device to be used in any design.
An electric type of burner that is powered by standard batteries.
The presence of a copper heat exchanger significantly improves operation and performance properties.
To use liquefied gas, manufacturers offer the use of an additional kit with a burner.
The device operates at a minimum fluid pressure of 0.15 bar.

Pros:

The presence of two separate handles for adjusting water pressure and power.
The water heater has high performance and heats more than 10 liters of liquid per minute.
The minimum diameter of the device's chimney is 11 cm.
The use of European components, which significantly affects the service life.

Minuses:

Availability of Chinese components, which often fail.
Automatic ignition is too loud.
Expensive spare parts made in Europe.

A gas water heater for an apartment or a gasified house may not have the function of switching to liquefied gas. The main thing is that the security system is at the highest level.

For a summer residence, flow-through models using bottled gas would be an ideal option, since hot water consumption is kept to a minimum.

The security system should include at least the most important points, for example, flame detectors, sensors for overheating and chimney backdraft.

The ignition system does not play a particularly important role. It all depends on your preferences and wishes. The same applies to size, color and other external parameters.

A water heating gas water heater with a working closed firebox is a highly efficient household new generation water heater, providing the maximum level of comfort and safety. Standard high-performance powerful gas column with a closed combustion chamber It is a flow-type gas water heating device with a forced ventilation system. A column with a closed combustion chamber has a distinctive feature in the ventilation device. In a universal water heating unit with this operating scheme, exhaust gases are removed outside the room forcibly, using an electric turbofan. This type of water heating gas water heater, for mixing natural gas in the working cavity, receives fresh air from outside the room, which significantly improves the degree of ventilation and gas pollution. The closed combustion chamber provides safer operation of a flow-type gas water heating device than an open one. This method of air exchange achieves a significant increase in indoor air quality.

We recommend purchasing high-quality household instantaneous water heaters with a manufacturer’s warranty in specialty heating equipment stores!

The presence of hot water today is considered one of the indicators of comfort. For decades, instantaneous gas water heaters have made it possible to use this benefit of civilization around the clock. They can heat the required amount of water almost instantly.

The heating process is directly carried out by a gas burner. And the device itself, due to its small size, can be mounted on the wall. But which model should you prefer and how not to make a mistake when buying a water heater? We’ll talk about this in our article - we’ll look at the ten best offers on the market, focusing on demand among buyers and positive reviews from owners.

We will also provide useful tips on choosing a water heater, taking into account which you can choose the right option for your home.

According to the type of combustion chamber, all water heaters are divided into two categories: with an open chamber or atmospheric, and with a closed chamber or turbocharged.

Atmospheric ones are considered more durable, since such devices do not have complex automation. Turbocharged ones operate using electricity and turn on even with minimal gas pressure, but they are more expensive.

If you are now looking for a new gas pump, then check out our rating.

Model #1 - Zanussi GWH 6 Fonte

The column heat exchanger is made of copper. There is an LED display on the front panel that displays performance indicators. A powerful security system will protect the device from unexpected breakdowns. The maximum hot water temperature reaches 65˚C.

Technical features:

productivity – 5.6 l/min;
thermal power – 12 kW;
dimensions and weight – 300x480x136 mm; 4.4 kg;
additionally - protection against overheating, smoke control sensors, a thermometer and a display.

Users consider quiet operation, high-quality parts, power, build quality and small dimensions to be advantages. Many owners say the downside is the lack of batteries included with the speaker and the fact that you need to select them yourself.

This small-sized speaker is ideal for one person, and will also fit perfectly into a small kitchen or even a bathroom.

Model #2 - Oasis OR-16S steel

The column heat exchanger is made of steel. The column is powered by batteries after the user opens the hot water tap. Winter-Summer mode will save gas consumption.

Technical features:

productivity – 8 l/min;
thermal power – 16 kW;
dimensions and weight – 320x520x145 mm; 6.3 kg;
combustion chamber – open with electric ignition from batteries;
manual heating control;
additionally - protection against overheating, smoke control sensors, a display and indication system are provided.

Among the advantages, it is worth highlighting the build quality and protection system. The disadvantage is that the batteries quickly become unusable. But the problem can be solved by selecting more durable batteries.

Due to its low performance, such a column is suitable for one tenant or for a small kitchen.

Model #3 - Zanussi GWH 10 Fonte Glass La Spezia

The speaker has a modern stylish design; there is a pattern on the front panel. Can work even with minimal water and gas pressure. The column heat exchanger is made of copper.

Technical features:

thermal power – 18.5 kW;
dimensions and weight – 330x550x191 mm; 10.2 kg;
combustion chamber – open with electric ignition from batteries;
mechanical heating control;
additionally - protection against overheating, smoke control sensors, a stainless steel burner operates on liquefied and natural gas.

Users like that the speaker is easy to set up, as well as the presence of a security system. The downside is that when turned on at two points simultaneously, the water temperature drops.

The speaker has an excellent design, so it will decorate any kitchen. The water heater will completely cover the water needs of one resident, or maximum of two.

Model #4 - Gorenje GWH 10 NNBW

The column operates quietly, the heat exchanger is made of copper, and operates on liquefied and natural gas. Users like the presence of water filters that protect the heat exchanger from scale, and the fact that the column can work perfectly on several types of gas.

Technical features:

productivity – 10 l/min;
thermal power – 20 kW;
dimensions and weight – 327x590x180 mm; 9.6 kg;
combustion chamber – open with electric ignition;
manual heating control;
additionally - protection against overheating and freezing, smoke control sensors, safety valve. A water filter is provided.

Many owners do not like that the water temperature drops to 35 °C if they turn on high water pressure or if they turn on the water at several points (bathroom and kitchen). Also considered a disadvantage is the high noise level, the lack of batteries included, and the fact that the membrane filter often breaks.

The water heater is suitable for both an apartment and a country house or cottage.

Model #5 - Oasis Glass 20RG

On the black front panel of the speaker there is an LED display and three control knobs. The heat exchanger is made of copper. The Winter-Summer mode will allow the intelligent system to analyze the water temperature and save gas consumption. It is especially beneficial if you have a meter for both gas and water.

Technical features:

productivity – 10 l/min;
thermal power – 20 kW;
dimensions and weight – 340x590x145 mm; 6.3 kg;
combustion chamber – open with electric ignition from batteries;
mechanical heating control;
additionally - protection against overheating and freezing, smoke control sensors, an RCD, and a display are provided.

The undoubted advantage of the column is its excellent security system that controls gas and water pressure, temperature, as well as build quality and seasonal mode.

Owners do not like the high noise level during operation of the device; some users say that after a while the speaker begins to gradually reduce the temperature or turns off.

The speaker is perfect for a family of two; it can be connected both in a country house and in an apartment.

Model #6 - Ariston Next Evo SFT 11 NG EXP

This column has a closed combustion chamber installed, so you should find a place for gas outlet in advance. A two-layer coaxial cable is used to remove recycled gas from the water heater. The external panel is made according to the sketches of an Italian designer.

The column heat exchanger is made of copper. A self-diagnosis system is provided and the user can adjust the water flow. For example, to fill a bathtub. Plugs into a standard outlet.

Technical features:

productivity – 11 l/min;
thermal power – 19.58 kW;
dimensions and weight – 330x550x167 mm; 12 kg;
combustion chamber – closed with a built-in fan;
electric ignition with connection to an outlet;
manual heating control;
additionally - smoke control sensors, protection against overheating and freezing, there is a display and a thermometer, a self-diagnosis mode, it works on liquefied and natural gas.

Users like the high level of safety, such as anti-gas leakage, anti-freeze and gas pressure control.

The disadvantage may be a non-standard hood, but this problem can be solved by a high-quality installation and a hose for removing combustion products.

A column of this type will cover the needs of two people, in economy mode - three. It can only be installed in the kitchen if there is constant ventilation.

Model #7 - Bosch WR 13-2B

The water heater operates quietly, but with high water pressure the noise level increases. The heat exchanger is made of copper. The front panel has a stylish design.

Technical features:

thermal power – 22.6 kW;
dimensions and weight – 350x655x220 mm; 13 kg;
combustion chamber – open with electric ignition from batteries;
mechanical heating control;
additionally - smoke control sensors, stainless steel burner, runs on liquefied and natural gas.

Among the advantages, it is worth highlighting excellent performance and a good security system.

Many users don’t like the fact that there are no batteries included, but high-quality ones last about 7-8 months and are expensive.

The speaker is suitable for a family of three. It can be installed both in an apartment and in a private house.

Model #8 - BaltGaz Comfort 13

The column is assembled from domestic parts, the heat exchanger is made of copper. It can operate on both liquefied and natural gas.

Technical features:

productivity – 13 l/min;
thermal power – 26 kW;
dimensions and weight – 350x650x239 mm; 12 kg;
combustion chamber – open with water cooling and electric ignition from batteries;
manual heating control;
additionally - overheating protection, smoke control sensors, heating temperature limitation. A display and thermometer are provided.

The advantages of this model are low price, high performance and a well-thought-out security system.

Users do not like the poor quality of the control knobs on the front panel, frequent display glitches, and the fact that the column does not turn on if there is not enough water pressure. That is why it is not suitable for residents of the upper floors, starting from the fifth.

Perfect for a family of 4 people. It can be installed for residents of private houses or the first floors of high-rise buildings.

Model #9 - Ariston Fast Evo 14C

The heat exchanger of this column is made of copper and has a power indicator. If such a column is installed in an old house, then you need to monitor the condition of the chimney as often as possible.

Technical features:

productivity – 14 l/min;
thermal power – 24 kW;
dimensions and weight – 370x580x230 mm; 10.2 kg;
combustion chamber – open with electric ignition from batteries;
mechanical heating control;
additionally - smoke control sensors, overheating protection, there is a display and a thermometer, it works on liquefied and natural gas.

Users like the build quality, the presence of a thermometer and a security system. A significant disadvantage is that the water temperature drops if you turn on the water at several points (shower and kitchen); there is no real-time temperature sensor. Also, many owners do not like long ignition times, but this can be avoided by spending a little more time on the initial setup of the device.

The water heater is suitable for a family of 3-4 people.

Model #10 - Bosch WRD 15-2G

The speaker has an excellent protection system and a small LED display. The heat exchanger is made of copper and runs on natural and liquefied gas.

Technical features:

productivity – 15 l/min;
thermal power – 26.2 kW;
dimensions and weight – 425x655x220 mm; 15.5 kg;
combustion chamber – open with electric ignition, operates on batteries;
manual heating control;
additionally - smoke control sensors, a stainless steel burner operates on liquefied and natural gas.

A significant advantage is considered to be high performance and thermal power.

Among the disadvantages, it is worth highlighting that seals and gaskets quickly become unusable, but they can be replaced with new ones. Also, some owners have problems with the heat exchanger, as scale appears due to poor quality water and lack of proper cleaning.

The water heater is suitable for a family of 3-4 people. It is better to install it in a country house or in an apartment on the lower floors, since the column does not turn on at minimum pressure.

Criteria for choosing a geyser

In order not to make a mistake in your choice, before purchasing you should pay attention to a whole set of basic and additional characteristics of the water heater. This will help you choose really high-quality and functional equipment that suits your needs.

Key technical indicators

Characteristic #1 - device power

The amount of heated water you can get directly depends on this indicator. There is useful and consumed power. When choosing a device, pay attention to the usable power.

The optimal power indicator ranges from 17 to 50 kW. To be able to simultaneously turn on several water consumption points, the power must be at least 21 kW. For a large house, you should choose a speaker with a power of 25 kW or more

Feature #2 - performance

Productivity is the amount of water heated by the column per minute. To correctly calculate the required performance, you need to know the pressure force.

This is quite easy to do. It is necessary to write down the number of cubes on the meter, turn on the water for 1 minute. After this time, tighten it, and then record the readings again. The difference between the second and first values will be the desired value.

If there is no meter, substitute a large container. Today there are columns with a capacity of 5-6 liters. They are suitable for apartments with low pressure and old pipes. For two or three people, 12-14 liters will be enough.

Method of removing combustion products:

Through the chimney. It is appropriate if the column is atmospheric. It is necessary to have the chimney cleaned from time to time by appropriate services.
Through Gas removal is forced if a column with a closed chamber is installed. For this purpose, the column has a fan powered by the mains. This option is suitable for new buildings, since there is no chimney.

Owners should check the traction condition as often as possible. It is best to check with paper. This test should never be carried out with a lighter or match, otherwise an explosion may occur.

To ensure safe use for boiler users, special parts are used:

Water overheating sensor will protect against boiling water, and the safety valve is responsible for the emergency release of water if there is high pressure in the pipes.
Hydraulic valve will protect the column parts from overheating.
Ionization and combustion sensors are triggered if gas is still flowing after the burner has gone out.
Flow sensor turns off the water heater if the hot water tap closes.
Draft detector triggers if the chimney is clogged with debris, so that no one gets carbon monoxide poisoning. And if there is no required water pressure, the low water pressure sensor is activated and the column will not turn on.

A lot depends on their quality. All these details will protect not only the device itself from breakdown, but also your health.

Additional information about the technique

Also, when choosing a gas water heater, you should pay attention to additional characteristics. For example, front panel appearance important, since a black speaker will not fit into a white kitchen.

Many speakers do not come with batteries. Find out in advance which batteries are suitable. Experts recommend using alkaline batteries, they are more powerful

Before doing so, it is important for specialists to assess the condition of the gas pipes, the pressure level and eliminate faults, if any. Such precautions are necessary to avoid gas leaks and poisoning of residents.

In addition, installation should only be ordered from professionals, because not only your health depends on it, but also the possibility of obtaining a warranty on the gas appliance.

Conclusions and useful video on the topic

Some video tips from professionals to help you make the right choice.

How to choose a gas water heater for a cottage or apartment? What should you focus on? The specialist gives detailed instructions:

To choose a reliable and high-quality geyser, make a personal list of important technical characteristics.

The fundamental indicators when choosing will be performance and power, and all the rest depend on the situation and user needs.

Are you thinking about purchasing a flow-through model of a gas water heater, but still doubt the safety of the model you like? Ask your questions under this article - our experts and other site visitors will dispel your doubts.

A gas instantaneous water heater allows you to organize reliable and efficient preparation of hot water. Gas supply today is available in almost every home, and the water heaters themselves are installed in many houses and apartments. Of course, the speakers have a number of disadvantages, but in terms of their efficiency they are ready to compete with many other water heating equipment. How to choose a gas instantaneous water heater and what to pay attention to when purchasing it?

Modern industry has presented buyers with a variety of geysers to choose from, differing in their properties and functionality. They also have different characteristics and performance. Our review will help you understand all this. In it we will tell you:

About the advantages and disadvantages of gas water heaters;
About the types of combustion chambers;
About choosing a speaker based on performance;
About flame modulation and temperature regulation;
About types of ignition;
About security systems;
About the most popular types of water heaters.

Using the information presented in the review, you can quickly choose the most optimal model for yourself.

Advantages and disadvantages of gas instantaneous water heaters

As we have already said, gas instantaneous water heaters have a number of advantages and disadvantages. In some ways, their use is completely justified, but in some cases it is desirable to use electrical equipment. Key benefits:

Cost-effective – using gas water heaters allows you to spend less money on preparing hot water. The savings are most noticeable with intensive use;
Powerful electrical wiring is not needed - electric instantaneous water heaters, if normal performance is required, will require a separate supply line. You also need good grounding;
They can work in non-gasified premises - for this you need to purchase a model with the ability to be powered from a gas cylinder.

There are also a number of disadvantages:

Difficulty in installation and connection - It is advisable to have a specialist do this;
The need for regular maintenance - you have to pay for this separately;
Possible gas leaks - the high explosiveness of natural gas makes it necessary to carefully monitor gas equipment. For example, a column with piezo ignition needs to be extinguished when no one is at home;
It takes time to heat up the water - the same electric storage water heaters supply hot water almost immediately.

Despite certain disadvantages, it is customary to install gas instantaneous water heaters in gasified houses - they are economical and can provide hot water to several water supply points at once.

The disadvantage of gas instantaneous water heaters is that their use in some buildings is simply prohibited. Also, they cannot be installed in modern new buildings where there is no gas supply.

Types of combustion chambers

Water heaters with a closed combustion chamber, unlike gas water heaters with an open combustion chamber, use oxygen from the street to maintain the fire and do not require ventilated rooms.

A gas instantaneous water heater can have an open or closed combustion chamber. Both options have their advantages and disadvantages. Columns with an open combustion chamber are easy to operate and simple in design. In them, the flame burns with the addition of atmospheric air from the room - it is taken from below, after which the combustion products are removed through the chimney. Columns with open combustion chambers are quite cheap and do not require the use of special chimneys - the chimney that already exists in most apartments is sufficient.

Geysers with a closed combustion chamber can operate without a house chimney. They also do not need ventilated rooms. They take air for their work from the street, and throw out combustion products there too - coaxial chimneys are used here, which are a “pipe within a pipe”. The coaxial chimney can be routed directly beyond the wall on which the water heater is mounted. The only requirement is that the nearest windows must be at least a meter away.

Such columns are safe, since combustion products are removed forcibly using a built-in fan.

Columns with closed combustion chambers are more complex in their design. Therefore, they are characterized by increased cost. Also, for their operation, a connection to a 220 Volt network is required - the fan installed inside requires a separate power supply. From all this comes another drawback - if the power goes out in the house, you will be left not only without light, but also without hot water.

Performance and Power

To correctly select the power of an instantaneous gas water heater, decide on the type and number of water intake points.

These two characteristics are the most important, since they directly determine how much hot water the selected water heater can produce. Productivity directly depends on the power of the selected unit. For example, a 23-24 kW dispenser can provide water treatment up to 14 l/min with heating at 25 degrees. This performance is enough to simultaneously take a shower and wash dishes.

Want a more economical option? Then take a closer look at low-power models, from 16 to 19 kW. They will provide preparation up to 9-10 l/min, this is enough for a washbasin with a kitchen sink or for a comfortable shower at any temperature. Do you want to provide hot water to more consumers? Then you need to take a closer look at geysers with a power of 28 kW and above.

When choosing a geyser, you need to remember that their characteristics indicate performance when heating water by 25 degrees. If you need to increase the heating temperature by reducing the pressure, then the performance will be completely different. However, it is almost never necessary to heat water above +40 degrees - there is no need to force the water heater to work at the limit of its capabilities.

Temperature adjustment and flame modulation

A gas instantaneous water heater should be easy to operate. That is, not only the gas supply level, but also the pressure must be regulated here. This way, you can ensure the operation of the column even with reduced water pressure in the tap. It is also desirable to have a liquid crystal display that will display the temperature of the water leaving the instantaneous water heater. In the absence of a display, the heating level will have to be adjusted “by touch,” which can result in burns.

Temperature control is present in all gas instantaneous water heaters. But flame modulation is not available everywhere. Why is this option needed at all? It will allow you to maintain the temperature of the water at the outlet of the gas water heater when the pressure of water and gas changes. For example, conventional water heaters change the outlet water temperature when the toilet is flushed or when an adjacent cold water tap is opened. The presence of flame modulation will allow you to maintain the temperature at a given level.

Flame modulation works quite slowly, so it may not respond immediately to a sudden change in water pressure. Fortunately, this almost never happens. Also, speakers with flame modulation are characterized by some slowness when reaching temperature. But this is better than getting burned from excessive hot water when starting a regular column. Therefore, our choice is the presence of flame modulation - a really useful thing.

Ignition type

How to choose a gas instantaneous water heater based on this characteristic? First, you should understand that there are three types of ignition:

Electric;
Piezoelectric;
Hydrodynamic.

Electric ignition is economical. It operates on batteries and generates a spark using a small high-voltage electronic circuit. Columns with such ignition are safe, since they do not have a constantly burning pilot light. There is also no additional gas consumption. But there are also disadvantages - you need to regularly change the batteries, since a low ignition voltage causes startup with a bang.

For normal operation of gas instantaneous water heaters with electric ignition, it is advisable to use powerful alkaline (alkaline) batteries.

Piezoelectric ignition allows you to get rid of the purchase of expensive batteries - and this is a definite plus. In addition, it ignites the gas in the burner instantly, since there is a constantly lit pilot light above it. But the igniter wastes gas, and leaving it lit in the absence of household members is unsafe. It also causes additional gas consumption.

Hydrodynamic ignition uses an electric generator to operate, which supplies an electric current of varying strengths, depending on the water pressure.

Hydrodynamic ignition is the safest and most economical. Inside the columns with this type of ignition there is a small generator driven by water. When the tap is opened, water begins to flow through the generator blades, as a result of which it produces the current necessary to generate a spark. There is no additional gas consumption, no need to buy batteries - all advantages. The increased cost of a column with hydrodynamic ignition and reduced reliability of the system are disadvantages.

Security systems

Everyone knows very well that natural gas is explosive. And its presence in the air negatively affects human health. Therefore, a good geyser must have the following security systems:

Flame presence control;
Control of traction;
Heat limitation;
Pressure meter.

The flame detection system operates on the basis of a thermocouple. The most advanced columns are equipped with ionization control, which is faster. If the flame goes out for some reason, the protection system will shut off the gas supply. It is also desirable to have a draft control system, which will prevent a gas explosion and leakage of combustion products into the room.

Limiting heating prevents overheating of the heat exchanger as a result of incorrect settings. If the column has a water pressure sensor, it will prevent the column from continuing to operate if the heat exchanger is damaged or there is a leak.

Most popular models

This column from the Russian company Neva received fairly high user ratings. The device has a capacity of 11 l/min and a power of 21 kW. The column is equipped with an open combustion chamber, an electric ignition system, power-on and heating indicators, and a thermometer. Gas control is also provided. For its operation, the column requires batteries, which power the ignition system. The design of the device is very simple, and the price will please every buyer.

The water heater has received many user reviews, both positive and negative. The number of positive reviews exceeds the number of negative reviews, which is already a big plus. Among the advantages we can include the undoubted simplicity of the model, ease of temperature adjustment and the presence of a thermometer. The downsides are a rather weak heat exchanger and poor performance at low water pressure. But overall, this is a decent device from the budget segment.

This is one of the best geysers from a renowned manufacturer. Her reviews are mostly positive - we can safely regard her as the optimal choice. Buyers praise the device for its stable operation at low water pressure and ease of settings. Users also note the presence of such a useful option as monitoring the battery status. The appearance of the device is also pleasing - it is immediately clear that this is a completely modern gas instantaneous water heater.

The Electrolux GWH 265 ERN Nano Plus dispenser has a power of 20 kW and a capacity of 10 l/min. It is equipped with an open combustion chamber, a pleasant control panel with an informative display, a thermometer, and numerous security systems. Support of heating temperature at a given level is also implemented. The ignition system is electric, runs on batteries. The minimum inlet pressure is 0.15 atm.

The best geyser from Bosch according to users. In any case, she is very popular. If we compare it with other models, we can note the efficiency of the device - with a productivity of 10 l/min, its power is 17.4 kW. There is no electric ignition here, but there is a simple piezoelectric ignition. It lights the burner instantly, saving users from loud bangs when the batteries are dead. There is no flame modulation on board, so households will have to periodically adjust the heating temperature.

Hot water in the house is necessary for the comfortable existence of every family. Due to supply instability, many are forced to use different water heaters. An electric boiler is characterized by excessive energy consumption, so a gas water heater with a closed combustion chamber would be an excellent alternative.

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Features of chimneyless speakers

The design of the device is a flow-through water heating column powered by the combustion energy of natural or bottled gas. Cold water enters the unit from the pipeline, is heated using a burner, after which hot water comes out of the tap. It is known that an ordinary gas appliance is equipped with a rather high chimney. Combustion products are removed using natural draft through the open lower opening.

A coaxial water heater functions differently. It has a different principle for eliminating combustion waste. The device is characterized by a sealed combustion chamber, and to eliminate gases, a coaxial chimney is used, which goes outside through a hole in the wall. A two-layer pipe is distinguished by the following: exhaust gases are eliminated from the inside to the outside, and fresh street air necessary for combustion enters the column through an external channel.

Geyser Bosch Therm 4000 O (review and setup)

A chimneyless flow-through device is equipped with a fan that directs combustion products into a coaxial chimney. This type is called a turbocharged column. Using a turbine or built-in fan, smoke is forced out of the firebox.

The convenience of using such a device lies in the fact that oxygen is not burned in the apartment, and the use of additional air flow for combustion is also not required. If there is no need for a separate vertical chimney, it becomes possible to save money on the purchase of materials and installation work.

Principle of operation

The functioning of a flow-through device with turbocharging is the same as that of a conventional gas water heater, only with a more advanced device that has a high level of automation. When you open a hot water tap, a certain flow rate occurs, according to which the main burner and fan turn on, and after closing the tap, they turn off.

The modulation burner device of the column with a pressure operating principle differs from combustion in the open chamber of conventional devices, where air enters in unlimited quantities, which reduces the efficiency of fuel combustion. In a turbine unit, air is supplied in doses depending on the needs of the burner. This results in a higher heater efficiency - up to 90−94%.

After opening the tap, the water unit supplies gas to the igniter, and the sensor contacts close. Next, a spark is formed, igniting the wick. The fuel then enters the burner and is ignited by the pilot light, which immediately goes out. The device will function and heat water, until the tap closes or some emergency occurs:

the traction sensor will work;
the pressure in the pipeline will decrease;
the main burner goes out;
the device responsible for overheating will work;
gas pressure will drop;
the power will turn off.

The turbocharged column is equipped with a modulating gas burner. It can automatically influence the intensity of the flame based on changes in water pressure.

Positive and negative characteristics

Flueless gas water heaters are applicable in any premises, even in those where the design does not provide for a chimney: a country house or cottage, an apartment in a multi-storey building. There are some other advantages:

the room temperature does not increase, this is noticeable especially in hot weather;
high efficiency due to turbocharged exhaust air removal, when in a standard device this occurs spontaneously;
absence of odors inherent in gas waste with complete isolation of the sealed combustion chamber.

Geysers Tornado.

A gas water heater with a coaxial chimney is an effective solution to the issue of hot water supply. Its main advantage is the quick preparation and supply of heated water. However, using such a device has certain negative aspects:

When the fan is running and air masses move at high speed, noise is heard both in the apartment and on the street. Neighbors upstairs may be dissatisfied with the noise and smell of waste combustion products.

Ways to control a coaxial device

Geysers with a coaxial chimney have two different parameters - the control system and the type of ignition. The control method depends on the use of different types of burners - these are variable with automatic power control, as well as constant, the power of which is adjusted by the owner of the gas water heater:

Which Bosch geyser to choose, what is the difference? there are answers!

A flow-through chimneyless column can have three types of ignition. It ensures safe operation of the equipment and increases the comfort of its use:

If you choose a chimneyless heating column, you should familiarize yourself with some of the device’s parameters. This determines how comfortable the device will be to use, safe and efficient in the use of energy resources.

Geyser! Save gas!

Parameter indicators

The power of the column is an indicator of its performance and an important parameter characterizing the ability to heat water per unit of time. You should not save money by choosing a low-power unit that is not able to fully heat cold water with good pressure.

You can determine the power of the device that is required for use. To do this, the parameter specified in the technical data sheet should be divided in half. The resulting number is the consumption of water heated to 30 degrees per unit of time. For example, a device with a power of 20 kW can heat up to 10 l/min. To estimate this volume, you need to know the hot water consumption.

Productivity is characterized by the volume of heated water. It is produced by a flow-through unit in one minute of operation. For example, the documentation for the device states that the column will heat 10 liters of water to 25 degrees. This does not mean that the water will not heat above 25. To the number you need to add the temperature of the water from the tap, for example, 15, therefore the water is heated to 40 with a flow rate of 10 l/min.

It is believed that each of the plumbing units: washbasin, shower or kitchen sink uses about 5.5 l/min. hot water. The use of a gas water heater without a chimney would be advisable, especially in a country house or country house. You should weigh the pros and cons when choosing and installing such a unit.

Safety of turbocharged units

Many users are confident in the safety of chimneyless speakers, but this is a false belief. Any appliances that use gas require compliance with safety rules and caution. If one of the modules of the water heating system fails or the temperature of the liquid increases, the column is turned off automatically. This indicates increased safety of the device, provided it is installed correctly. But if a turbocharged water heater is installed in an apartment in a multi-storey building, carbon monoxide gases rising will harm the health of the residents.

Before purchasing an expensive gas appliance, you need to consider its advantages and disadvantages. In addition, the optimal location for its location should be determined. If any doubts or difficulties arise, it is better to choose another type of unit.

Compliance of the device with the interior of the apartment

A column without a chimney fits well into the interior of the apartment. It can be installed in the bathroom or kitchen, the main thing is that one of the walls of the room communicates with the street, since you will need to make a hole for installing a coaxial pipe. If such a possibility exists, the installation can be carried out without problems. The advantage of the device is the absence of an unsightly chimney pipe, which is unlikely to decorate the walls.

The speaker should be in harmony with the interior. A wall-mounted water heater looks neat and does not spoil, and sometimes even complements the decor in the room. For example, the compact gas water heater Neva 4510-M combines a lot of advantages, the main one of which is an affordable price. Device characteristics:

There are also disadvantages in the characteristics of a gas water heater with a closed combustion chamber. It is not equipped with a smooth modulation device, which does not allow the device to operate at two water points. And also the low power of the dispenser is 17.9 kW, allowing it to produce only 9 l/min.