Which gas storage water heater to choose for your home

The principle of operation of a storage gas boiler

There are several different types of water heaters. Despite the difference in design, all tank-type gas boilers have the same operating principle. Water heating is carried out as follows:

• Combustion chamber - at the bottom of the housing there is a burner with forced or natural draft. When gas is burned, heat is released. Unlike flow columns, the burner is not in direct contact with the heat exchanger. The task of the combustion chamber is to generate heat and direct it to the flame tube.
• Heat exchanger - the boiler does not have radiators usual for instantaneous water heaters. The heat generated by gas combustion is directed into the flame tube. The walls of the heated pipe are in contact with water for hot water supply. Heat exchange occurs.
• Supplying water to the consumer - the heated liquid remains in a heat-insulated container. The water heater automatically maintains the temperature. When you open a water supply tap, hot water pressure is created, as in a conventional boiler, by displacing it with liquid from the cold water supply. Hot water is instantly supplied to the consumer.

The first heating is carried out within 20-30 minutes. After which the boiler continues to maintain the required comfortable temperature, while gas consumption is reduced to a minimum. The internal device contains: automation, a system to prevent calcium deposits (magnesium anode), as well as various sensors (gas pressure, water pressure, draft). The volume of storage tanks for household purposes varies from 80 to 200 liters.

Ignition type

In all modern water heaters, the main burner ignites automatically when the water tap is opened. It ignites its ignition device, which can be like this:

Pilot burner (wick)

This is a small gas burner that the user lights manually in the morning, after which it burns continuously in the column. In the old days, the wick was lit with a match, but today the speakers are equipped with a piezoelectric element, so that to ignite you just press a button.

Ignition tube for water heater Neva Lux 5513

The igniter is designed extremely simply, so speakers equipped with it are cheaper than others. But they are more expensive to operate: a constantly burning wick increases gas consumption by an average of a third.

Electric ignition

A much more economical option: when gas is supplied to the main burner, a spark is generated, which ignites it. To produce a spark the following can be used:

1. Current in the household electrical network: in this case, there should be an electrical outlet next to the speaker.
2. Batteries: it is important not to forget to change them promptly, otherwise the speaker will stop turning on.
3. A piezoelectric element driven by a flow of water: for this purpose, a turbine is installed in the pipe.

If a resident of a rural locality is going to purchase a dispenser with such an ignition device, he or she must clarify at what minimum pressure in the water supply it can operate.

How to choose a storage type gas boiler

There are several dozen different models of boilers on the gas water heating equipment market. When choosing, experts recommend paying attention to several technical characteristics:

• Tank type - how to correctly calculate the volume of a storage tank is explained below. In addition to calculations, you need to decide on the choice of tank material. Manufacturers make tanks from the following types of metal:
  Stainless steel is the optimal material, characterized by long-term operation and corrosion resistance. The only drawback: high cost. Stainless steel has several classes. Only special food-grade stainless steel can be used for the storage device.
• With an enameled tank - there are several types of coating. Previously, the boiler tank was protected using ordinary enamel, which was used to cover dishes. Cheap water heater models still use this type of protection. Disadvantages: susceptibility to mechanical damage and thermal effects. The service life, even with careful use, does not exceed 5 years. Glass-ceramic coating is a modified enamel with good strength characteristics and heat resistance. Glass ceramics have a longer service life, up to 7-8 years of service.
• With titanium coating - the characteristics of boilers are similar to those made of stainless steel. The tank of a capacitive boiler will work freely for at least 10 years, and the durability is not affected by the intensity of water heating (as is the case with a conventional enamel coating).
• Burner type - there are conventional atmospheric and closed burner devices, with forced oxygen supply into the chamber. When choosing, they are guided by the technical conditions of the room used for installation. There are several types of storage tanks:
  Atmospheric gas boilers - they take air from the boiler room using natural circulation.
• Turbocharged storage water heaters with a closed combustion chamber - oxygen is supplied from the street (models with a coaxial chimney) or from the room, in a forced manner. Turbo boilers are economical. Disadvantages: noisy when turned on, volatile.
• Ignition type - not all water heaters work the same. Based on the inclusion principle, there are two main types of drives:
  Automatic ignition - runs on batteries or mains. Switching on occurs when the water temperature drops below the specified parameters. Water heaters with an electronic ignition system operate in fully automatic mode. The consumer is only required to set the heating temperature.
• Piezo ignition - in this case, a constantly working wick is provided inside the water heater. Ignition is done manually. The igniter flame is ignited by a piezoelectric element. The wick works continuously and lights the main burner.
• Fuel type - tank-type boilers operate on propane (bottled gas) and methane (from the central line). There are universal models. The latter can be easily converted to alternative fuel after changing the injectors and switching the mode. Water heaters with the ability to operate from a cylinder can be connected to a gas tank.
• Installation principle - the drives are designed in two solutions. The first ones are intended for floor installation. The volume of storage capacity is practically unlimited. Water heaters for wall mounting are limited in volume. The maximum capacity usually does not exceed 100 liters.

After selecting a storage tank according to the 5 criteria described above, we proceed to calculating the volume of the storage water heater. You can do the calculations yourself.

Types of combustion chambers

The combustion chamber in a gas water heater can be:

• open;
• closed.

In the first case, the chamber communicates with the room, from where combustion air is drawn into it.

This is the cheapest option, but it is potentially dangerous (if the draft is disrupted, carbon monoxide can enter the room) and requires constant ventilation, which in winter leads to significant heat loss.

The closed chamber is isolated from the room, and air is supplied into it through a pipe from the street.

But this option also has its drawbacks.

Natural draft is not enough to draw air through a long pipe - it has to be pumped with a fan. Accordingly, if there is no power supply, such a column cannot work.

But smoke removal is also carried out forcibly, so the chimney does not have to be vertical - you can lead the pipe to the street through the wall.

How to calculate the volume of the boiler?

To choose the right boiler with the right volume, you must remember that there should be 50 liters per person. If installation is required for a family of four people, then a boiler with a capacity of 200 liters can be considered the optimal choice. But we note that calculating the capacity of a gas installation is an individual matter. If the family does not waste water, then in this case a tank of 50 or 120 liters will be sufficient . However, such a boiler installed in the bathroom will not allow all family members to take a bath consistently. You will have to wait some time for the water to heat up.

Additional device selection options

When choosing a storage gas boiler, you should pay attention to the following important parameters.

Rated power

This indicator for gas products starts from 4-6 kW: in a boiler with a tank volume of at least 150 liters, 7 kW burners are installed - it only takes about an hour to heat the entire volume. An electric boiler with similar parameters takes from 2 to 4 hours to heat up. The decisive factor here is that gas is much cheaper, and in operation there are other nuances in favor of the gas option.

Material of manufacture

The tank of modern products is made of a simple grade of steel coated with special compounds or from very expensive stainless steel. Each option has its pros and cons.

The first option is much cheaper than the second, but when choosing, the user must also take into account the fact that the first tank has thinner walls, which is of primary importance when frequent water hammers occur in the water supply system. Stainless steel is more resistant to corrosion, and the special enamel coating can crack over time - the container quickly rusts and becomes unsuitable for use.

When various coatings are used, from titanium to porcelain glass, the service life of the container has different time values, but the composition of the coating has a strong influence on the final cost of the product. There is another nuance here: frequent temperature changes cause microcracks to appear over time; to prevent their appearance, the user must set the temperature to not exceed 600C. Sometimes, to prevent the development of various bacteria, it is necessary to heat the water almost to a boil.

Today, boilers with stainless steel tanks are considered the most reliable. Their warranty is 7-10 years, while tanks coated with porcelain glass only have a warranty of no more than 12 months.

Magnesium anode

All boilers are equipped with such a device, its technical name is electrochemical protection with a sacrificial anode, which is made mainly of magnesium, sometimes of zinc. The anode gradually dissolves due to oxidation, providing reliable protection of the inner surface of the tank from corrosion. Replacement also depends on the structure of the water: it is changed at least once a year for sprayed tanks, and when a stainless steel tank is installed, there is almost no need to change the anode. When purchasing, always inquire about the presence of a magnesium device inside the product or find similar information in the instruction manual.

Gas boiler installation

The owner exposes himself to great danger when he decides to install the boiler on his own. Therefore, it is better to entrust the installation and connection of a gas water heater to professionals, and the owner should pay attention to a number of points:

• installation of a boiler can only be carried out after obtaining permission from GorGaz. This will not be a problem if the gas boiler is installed on the site of an old gas water heater;
• If you have never had a water heating device before, obtaining permission will take more time and effort. The purchased unit must comply with all existing standards. In addition, the boiler must be certified.

Common gas heater failures

If we consider the most common breakdowns of gas instantaneous water heaters, we would like to highlight the following problems:

• device leakage;
• extinction or absence of flame;
• insufficient production of hot water;
• scale formation in the heat exchanger.

If this is a device with an electronic control unit, you need to check the power supply . If it is missing, then the breakdown can be easily repaired on your own. In case of water leakage at the joints of fittings and tees, they must be tightened. All other work related to the violation of the integrity of gas equipment can only be performed by warranty service or gas service specialists.

A gas instantaneous water heater is a guarantee of comfortable living in any home. The main thing is to choose a device that meets all operational characteristics and safety requirements, which is not so difficult given the widest range of such products on the heating systems market.

Recommendations for choosing water heaters

Gas boilers are devices that pose a certain danger when used.
Therefore, you should approach the task of choosing them extremely responsibly. If you have planned to purchase a gas water heater, but your home does not have a chimney , then you should choose from units equipped with a closed chamber or equipped with a turbo hood. It is prohibited to install hybrid-coaxial chimneys in enclosed spaces. Their installation is usually carried out in boiler rooms or utility rooms with an effective ventilation system.

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When choosing gas equipment for heating water, attention should also be paid to its power. It is optimal to buy a device that has a power/performance ratio of less than two units.

The most important thing when choosing gas equipment is safety. Before buying the selected device, you should make sure that it has protection against overheating and dry running.
You also need to check that the boiler has draft and pressure sensors.

Security measures

Often, many users have doubts about the safe use of equipment using an open flame, but manufacturers assure that they have taken all necessary safety measures. Such systems include:

• a draft sensor that is triggered in case of any malfunction of the chimney - it immediately turns off the gas supply;
• hydraulic valve - it instantly reacts to the lack of water, the gas supply is immediately blocked to prevent overheating of the equipment;
• the flame controller is an ordinary thermocouple, sometimes it is supplemented with an ionized corrector; if the flame goes out for some reason, the gas supply is blocked, thereby preventing its unwanted leakage.

The exhaust hood, which any product of this class has, prevents the possibility of combustion products from flowing back into the room where the boiler is installed. Therefore, the user does not have to worry - all harmful substances are reliably removed and the inhabitants of a country house do not face headaches in the morning due to the use of a gas water heater.

Advantages and disadvantages of gas water heaters

A gas instantaneous water heater has a number of undeniable advantages in comparison with other analogues:

• comparatively cheap energy resources consumed – heating water with gas is cheaper than heating it with electricity;
• unpretentiousness to the quality of heated water - scale does not form on the walls of the heat exchanger, unlike heating elements.

And given the frequent power outages and power surges that are typical for private homes, the use of electric water heaters becomes impractical. Plus, the discrepancy between current parameters in domestic power systems significantly reduces the efficiency of electrical equipment.

If we consider the disadvantages of gas water heaters, we would like to pay attention to the following features:

• The water pressure in the cold water supply must correspond to the minimum established parameters of 0.25 atmospheres. The use of flow-type gas equipment for heating water on the upper floors of a high-rise building is not always possible due to low water pressure.
• Due to the production of exhaust gases during fuel combustion, a chimney and a high-quality ventilation system are necessary.
• Connection to the central gas supply line can only be made if all permitting documentation is available.

Features of installation of instantaneous water heater

Before installing an instantaneous water heater, first you need to read the recommendations for its installation, which indicate the parameters of the water supply and gas supply system suitable for connecting the device:

• The water pressure in the cold pipeline must be at least 0.25 atmospheres.
• The wall on which the geyser is hung should not have materials that are easily flammable.
• If a closed-type device is installed, then the room must have a minimum area of ​​six or more square meters, and for an open gas water heater 8, respectively. In this case, there must be an influx of fresh air.

Despite the fact that all instantaneous gas water heaters differ depending on the device model, the scheme for connecting them has a similar algorithm of actions and is determined by the presence of certain communications.

1. Exhaust gas exhaust system design. In a city apartment this is a central ventilation riser, and in a private house it is a chimney pipe.
2. Installation of a gas water heater. The device is installed directly under the hood and connected to it using a corrugated pipe. The speaker is fastened with self-tapping screws directly to the wall. The device must be located strictly in a vertical position.
3. Insertion of a flow-type water heating device into the water supply system. A tee is cut into the cold water supply pipeline, through which a gas water heater is connected using a piece of pipe. This stage also involves the installation of related elements: filter, pressure sensors, shut-off valves, etc.
4. Connecting hot water supply. Tapping into a hot water supply pipe is carried out in the same way as supplying cold water through a tee.

All work related to connecting gas equipment to the gas supply main can only be carried out by certified specialists of the relevant utility service.

Typical breakdowns and how to fix them

Repairing a gas water heater is an activity for highly qualified specialists. However, some breakdowns can be fixed with your own hands. Before starting work, you need to close the water and gas supply taps. After this, you need to unscrew the mounting screws and remove the handles and speaker housing.

Here are some examples of when a gas water heater won't light up:

• Water heaters with automatic ignition systems may run out of batteries. All you need to do is replace the batteries.
• For water heaters that have a built-in generator, the piezoelectric element, electrode or power cable may malfunction. It is necessary to clean the contacts of the automatic ignition system, check the electrodes and wires for malfunctions. If all these steps do not help, you need to check and replace the power button and the piezoelectric element.
• If there is no draft, you need to clean the ventilation; to do this, you should call a specialist.
• If the pressure is insufficient, you should pay attention to the water supply or heater assembly. All that is needed is cleaning the pipes, washing or replacing filters.
• If the gas water heater does not turn on, you should check and, if necessary, replace the membrane of the water unit. To do this, remove the water-gas block and, by unscrewing the screws, separate its water part. Before removing the rubber plate, it is important to remember its location. Then you need to clean the inside of the cap and install a new rubber part on the plate with the stem. It is better to replace the membrane with silicone, which lasts longer. Finally, you can tighten the screws (preferably diagonally).
• Some gas devices have a knob for adjusting the water flow. If the column does not light up, you need to check how the mechanical switch is located. If the pressure is not large enough and the column does not start, you should set the knob to the leftmost position and switch to the right until the device turns on. You need to adjust the jet at startup.

Features of choice

In one of the articles we wrote how to choose an indirect heating boiler, so we will consider the features of choosing gas instantaneous water heaters. What parameters should you pay attention to first?

Rated power

To make the right choice, calculate in advance the required amount of hot water depending on the number of consumers. Speakers can be divided into three types based on power consumption:

• Low power - from 17 to 19 kW. Such devices are suitable for servicing two consumers and two intake points (for example, a washbasin and a shower). They give out about 8 liters per minute.
• Average - from 22 to 24 kW. Installed in private homes for 3-4 users.
• High - from 28 to 30 kW. Can be used for bathroom fittings and other purposes at the same time. Provides good pressure and heating.

Pay attention to the efficiency indicated in the document. There may be useful and consumed power - you need useful. Otherwise, you risk buying equipment that will not meet your needs.

Ignition type

The convenience and safety of operation depends on this criterion.

• Manual ignition . One of the first and budget models. To start heating, you need to hold the button and bring a match to the igniter. This method is inconvenient and unsafe.
• Piezo ignition . The difference with the first option is that a spark appears when the button is pressed. Mechanical activation is convenient if the device is nearby.
• Electronic type . As soon as you open the faucet, a spark appears and starts the process. It lights up when the batteries are fired.
• Hydrogenerator . The built-in mini-turbine rotates with the flow of water and generates current. The flame appears when the tap is opened. The higher the pressure in the system, the more efficiently the turbine will operate and heat.

Modulation system

The flame intensity of the burner can be adjusted by the user or by an electrical relay. Modulating burners regulate power automatically. This is convenient if pressure drops are observed in the system. In this case, the device independently adjusts the heating strength - the water coming out is the same temperature.

Type of radiator (heat exchanger)

Their quality and service life depend on the material of manufacture. There are heat exchangers from:

• Become. They are distinguished by significant weight and resistance to corrosion.
• Highly purified copper. To the above qualities you can add high heat transfer.
• Copper. The radiator heats up unevenly, so cracks appear in it quite quickly due to temperature changes. Some manufacturers coat the product with heat-resistant paint, but still such a heat exchanger does not last long.

Removal of combustion products

Since heating in a flow-through heater occurs due to gas, its combustion products must be discharged somewhere. Combustion chambers are divided into:

• Open. Such devices are equipped with a chimney and ventilation. The air that supports combustion comes from the room. They have a high efficiency. But not all apartments can have a chimney.

Arrangement scheme:

• With a closed camera. The output is carried out using a fan through a coaxial pipe. Since there is no need to install a chimney, you can save money.

Important to consider! If you have plastic windows installed, they may interfere with natural ventilation. As a result, the ignition may not work or function unstably. Way out of the situation: installing a ventilation valve. It crashes into the window part.

Operational safety

If you take a gas water heater for an apartment, take care of your safety. To do this, make sure that the equipment is equipped with devices that control its operation.

• Traction sensor. Triggers when the chimney malfunctions. It closes the fuel start valve, eliminating gas poisoning.
• Ionization detector. Turns off the device when the flame goes out.
• Electronic control unit. Controls the operation of nodes, allowing you to set optimal parameters to avoid overloads.
• Flow sensor. Starts the burner when the mixer is opened.
• Safety valve. Triggers when there is increased pressure in the system, releasing excess pressure.
• Pressure detector. If there is insufficient pressure in the line, the burner will not turn on to avoid damage to the radiator.

What else should you take into account when choosing? First of all, the features of the room.

• The presence of a chimney to remove combustion products.
• Amount of water consumed and points of collection.
• Availability of free space for installation, ease of use.
• Design of the room and equipment.

It is better to entrust the installation of the device to a specialist. He must determine the draft and bring the pipes to the column.

If we compare gas and electric, the latter are easier to install. However, gas is cheaper to operate. Below we have collected the best water heater models.

Cost of water heaters

Prices for water heating devices depend on the brand, functionality and quality of the device. For example, prices for water heaters of the Ariston brand range from 4,200 rubles. up to 13,500 rub. For a minimal amount you can purchase a unit with a thermostat that changes the water temperature. This model is characterized by high thermal insulation, and the inside of the tank is coated with an anti-corrosion coating. In addition, this model heats water quite quickly.

For the maximum amount you can purchase a water heater with sufficiently high power and capacity. The tank has an anti-corrosion coating, quickly heats water, and has a beautiful design.

German gas water heaters are more expensive. The price of Bosh speakers ranges from 7,000 rubles. up to 80,000 rub. For 7,000 you can purchase a device with fairly high productivity and an improved security system. Fast water heating and overheating protection system. Materials of execution: stainless steel and copper.

For 80,000 rubles. You can purchase a fairly powerful and voluminous unit with many functions, made of high-quality materials.

Recently, Russian gas water heaters have begun to gain popularity. There are different reviews of Neva brand speakers. However, more and more buyers note the high quality and attractive design of gas devices of this brand. Gas water heaters "Neva" can be purchased for 6,000 - 11,000 rubles.

The cost of water heaters ranges from 2,000 rubles. up to 7,000 rub.

A gas water heater is a guarantee of comfort in any home. The main thing is to choose the most suitable option. And there will be no problems with the range of gas appliances.

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.

Which boiler is better?

As can be concluded from the information above, a gas storage boiler, or rather its connection, requires quite serious work. But if, as a result, the consumer’s desire has not disappeared or he simply does not have a reasonable alternative, then only one question remains: which water heater is better?

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It makes sense to create some kind of rating, but it hardly makes sense to include specific models in it. There are too many of them, and each boiler has its own characteristics and is designed for different operating conditions (user requirements). Therefore, it is better to compare manufacturers with each other, the range of models of which, as a rule, have the same type of design solutions that are available or not available from competitors.

So, in the domestic market, the segment of gas storage water heaters, paradoxically, is represented by foreign-made samples:

• BAXI. The well-known Italian brand is represented by the SAG3 model series, with a tank capacity from 50 to 300 liters. The tank is made of steel followed by enameling. The combustion chamber is open type. A burner with a piezo ignition function allows you to quickly switch from natural to liquefied gas, operating effectively at low pressure in the gas and water supply and with absolute energy independence. If necessary, it is possible to connect several boilers in parallel with an installed thermal power of 4 to 20 kW;
• VAILLANT. The products of the famous German brand are highly reliable and durable. The domestic market offers models with tank capacities from 130 to 220 liters. The thermal power required to heat such a volume of water to a temperature of 70ºC varies from 6.3 to 8.6 kW. In terms of design, we also have a steel enameled tank with an open combustion chamber. The injection burner used is also capable of operating on natural and liquefied gas;
• ARISTON. Another representative of the Apennine Peninsula, which has its own production facilities in Russia (electric boilers of this brand are definitely produced here). The range is represented by household water heaters with a volume of 50-195 l, which allow wall and floor installation. Technical solutions and characteristics are similar to models from previously mentioned manufacturers, but the price is significantly lower. For comparison, the Ariston SGA 200R model with a volume of 195 liters costs approximately 38,000 rubles, while its analogues BAXI SAG3 190 and Vaillant VGH 190/5 XZU cost 46,500 and as much as 80,000 rubles, respectively;
• HAJDU. The products of the Hungarian brand are also one of the oldest on the European market. In Russia it is represented by wall-mounted boilers with tank volumes of 80, 120 and 150 liters. This approach allows you to free up significant space compared to floor-standing analogues. In addition, water heaters from this company are distinguished by high efficiency, precise temperature control, the ability to operate in a chimneyless system and a warranty of up to 5 years. The price, which for the presented models is in the range of 25-33 thousand rubles, cannot but please;
• AMERICAN. The top five is completed by the MOR-FLO line of floor-standing boilers, made in the USA. Models with volumes from 150 to 284 liters are presented here, which allows them to be used in domestic and commercial environments. In addition, they are distinguished by a reliable enamel coating, excellent thermal insulation, an open combustion chamber with a powerful burner (there is a piezo ignition function). MOR-FLO water heaters cope perfectly with work at various pressures of water and gas, are non-volatile, and can be connected to operate in cascade. Like the HAJDU models, they have a long warranty period (6 years) at a fairly reasonable price: the 190-liter G62-75T75-4NOV has a price tag of 41,000 rubles.

Operating principle and varieties

There are two types of gas boiler:

• Flow-through.
• Cumulative.

A flow-through heater is also called a geyser. It consists of a metal body, a heat exchanger and a burner. As soon as the gas enters, the burner fires. It heats the water, which passes through the heat exchanger and exits through the mixer. The main advantages are fast heating and cheap fuel. However, to provide several sampling points, you need to choose high-power equipment.

storage boiler is installed in separate rooms. The principle of operation is as follows: the body of the water heater is connected to the heating system and a double-circuit boiler (piping is performed). Inside the tank there is a coil (heat exchanger) through which the liquid circulates. The gas boiler heats the heat exchanger, it gives off heat to the water, which is distributed throughout the system and used in the kitchen or shower.

The advantage of gas is the ability to use the boiler at any time of the year. Volumes of water can be huge: 100, 150, 200 liters. In production, 1000 liter tanks are used. There are wall-mounted models, but most often users choose floor-mounted options.

Ten best water heaters

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;
• combustion chamber – open with electric ignition from batteries;
• mechanical heating control;
• 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:

• productivity – 10 l/min;
• 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.

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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:

• productivity – 13 l/min;
• 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.

The rating included both time-tested speakers and already beloved new products in different price categories. Therefore, everyone will find a model to suit their taste.

Temperature adjustment and flame modulation

The simplest columns cannot regulate the water temperature.

The user sets the gas flow regulator to a certain position, ensuring one or another combustion intensity, and accurately regulates the temperature using pressure: the more the tap is opened, the lower the water temperature will be.

If the pressure in the system drops, for example, one of the household flushes water down the toilet, the user taking a shower may get burned.

More advanced water heaters have a flame modulation function. With its help, the column can automatically change its thermal performance, maintaining a stable outlet water temperature at any pressure in the water supply, gas pipeline and regardless of the inlet temperature.

It is very convenient when the front panel of the column has a display indicating the temperature of the heated water.

How to choose a heater

The main criteria for choosing a suitable geyser are the characteristics and technical capabilities discussed above, which are compared with the expected operating conditions.

1. Type of gas supply. High-rise buildings are connected to natural gas pipelines, and the pressure in the pipes is relatively low. If the instantaneous water heater is designed for the main version, then it cannot be connected to liquefied gas cylinders. This may cause an explosion, especially considering that many speaker models are equipped with an open burner.

If the cottage or private house is not gasified and is supplied with cylinders, then buy a water heater using liquefied gas. But it is best to purchase a universal instantaneous boiler with a gas burner for natural and liquefied gas. Such models are available in the Electrolux, Junkers and other lines.

2. Power

More important is the useful power: it determines what volume of heated water the water heater will provide at the outlet. The ratio of average hot water consumption and useful power is given in the table

If you are going to buy a flow-through boiler for a private home, it is advisable to choose a model with a capacity of 17-26 kW. For a family of 2 people living in an apartment, a power of up to 18 kW is sufficient: it allows you to simultaneously use the sink in the bathroom and the kitchen sink or shower. So that two family members can take a bath and wash dishes at the same time, you need a water heater with a capacity of 22-28 kW.

3. Method of thermoregulation. It’s good if the geyser is equipped with a thermostat: the water temperature is maintained at a given level regardless of water consumption. When another water tap is opened, the flow switch is activated and turns on the ignition. Gas water heaters with continuous modulation burners maintain a constant outlet water temperature, regardless of its fluctuations in the inlet pipe.

4. Regular pressure changes in the water supply. There are models that operate at certain values, and if the water pressure becomes less than the standard value, the water heater turns off. To avoid getting into trouble, you should study the instructions for the column.

5. Ignition method. When choosing a water heater, everyone decides for themselves what is better: to operate the equipment using a button, an electric relay or a miniturbine? The first option is cheaper, the second requires periodic replacement of batteries, the third is the most comfortable, but it requires sufficient water pressure in the system.

6. Exhaust gas removal method. If you select a water heater that operates without a chimney, the following nuances should be taken into account:

• its price is higher than a classic chimney;
• additional funds are needed for installation - punching holes, arranging a separate socket for the fan;
• coordination with the architectural service is required (the hole spoils the facade of the house);
• The turbo column is louder than usual.

7. Room area. Before buying the water heater you like, compare its dimensions with the dimensions of the room intended for installation.

8. Manufacturer. You should choose a company that produces high-quality equipment: even if its price is high, it will pay off with long, trouble-free service. It is advisable to study the review of gas water heaters on the manufacturers’ websites and find out the opinion of specialists. It is best to focus on reviews of people who inspire trust - relatives or acquaintances.

Cost of popular models

An overview of prices in Moscow for various types of water heating columns is given in the table.

The device and how the unit works

The appliances are not used for heating, but exclusively for heating water. For those who are planning to install a unit of this type, the operating principle of gas storage equipment is important.

First, the heat exchanger is heated, then the temperature of the liquid increases. The first is placed inside a metal tank made of a steel alloy (but the inner surface may be enameled).

The operating principle of a gas water heater.

The heat exchanger is a coil made of steel, cast iron or copper. It is heated by a gas burner. The design of the device also assumes the presence of pipes for water outlet and supply, and heat-insulating elements. A gas storage water heater must include a chimney.

The device is equipped with an ignition system and sensors that monitor the temperature and pressure in the system.

Instructions

Emptying the Thermex water heater tank

The process of draining water from a Thermex boiler consists of several stages:

1. First, prepare the necessary tools: a gas adjustable wrench and a rubber hose. Using a wrench, close the cold water supply pipe to the tank.
2. To prevent a vacuum from forming inside the container, open the hot water tap on the mixer.
3. Drain the water until the arrow on the boiler reaches the zero mark. When this happens, close the hot water tap.
4. At the point where cold water enters the tank, unscrew the check valve nut using an adjustable wrench.
5. Connect one end of the rubber hose to the cold water supply pipe. Lead the second end of the hose into the sewer or into a previously prepared container. Disconnect the hot water outlet from the unit. When you do this, water from the tank will flow through the hose.
6. Unscrew the nut that secures the hot water outlet. After this, air will begin to enter the boiler, and the tank will empty completely. It happens that water does not immediately begin to flow out of the container; in this case, you need to blow into the hose.
7. After draining the water, screw back all the unscrewed nuts.

Accompanying video

How to remove Electrolux brand from equipment

The advantage of Electrolux water heaters is their economical heating mode, which prevents the formation of scale on the inner surface of the tank. It is best to drain water from such boilers using a check valve located on the inlet pipe. Let's look at the process step by step:

1. First you need to shut off the cold water supply to the tank by tightening the appropriate valve.
2. Then you should put a hose of suitable diameter on the drain hole of the safety valve, and lead its other end into a prepared container or into a sewer drain hole.
3. Then you need to open the hot water tap on the mixer. The flag located on the side of the protective device should be raised so that water begins to flow out through the drainage hole.

As when working with other water heaters, the Electrolux boiler must be disconnected from the power supply before starting work.

Emptying the Ariston heater

To empty the Ariston water heater tank, you will need not only an adjustable wrench and a hose, but also a straight screwdriver and a 4 mm hexagon. We will describe the process of emptying the container step by step:

1. After disconnecting the boiler from the power supply, close the tap valve for supplying cold water to the tank.
2. To equalize the pressure inside the unit, unscrew the hot water tap.
3. Now you need to make sure that air gets inside the boiler. To do this, open the tap on the pipe supplying hot water from the boiler.
4. Connect a rubber hose of a suitable diameter to the device, open the water drain valve and empty the tank completely.

Video hint

Correct emptying of the Gorenje boiler

The principle of draining water from a Gorenje water heater is similar to the cases described above, the whole process consists of the following actions:

1. First, the boiler is disconnected from the power supply. Then open the valve on the hot water mixer.
2. After waiting until the hot water has completely drained, a hose is connected to the cold water tap, the return end of which is led into a sewer drain or into any suitable container.
3. By opening the drain valve and ensuring air supply to the tank, the boiler is emptied. This process takes about 10 minutes.

The water from the Gorenje heater can be drained through the safety valve.
Many people use this simple method, but this process takes a lot of time. Date: September 25, 2021

Which brand of water heater is best to buy?

In fact, almost all brands have both successful and downright weak models. Therefore, it is impossible to say unequivocally: they say, take a water heater of such and such a brand and you will be happy. Another thing is that the manufacturers identified in our review are the most popular and have a considerable number of positive reviews from current owners. Having chosen one, it will be much easier to decide on a specific instance of the device in the future. And to do this, you need to additionally analyze your need for hot water, the capabilities of your home electrical or gas network, and the availability of free space for placement.