Rating of gas boilers 2021-2022: TOP 20 best models and which one to choose

Autonomous heating systems are becoming commonplace.

Systems based on gas boilers are recognized as the most convenient and economical.

They do not require constant human participation, are not too expensive, and are capable of independent operation for a long time.

Modern models make it possible to use fuel energy with virtually no losses and have multi-stage protection from all external influences.

Let's consider the rating of gas heating units of various types and designs.

Gas or electric?

The question of the primacy of gas or electric heating has arisen for a long time, but has not yet been clearly resolved.

The main argument of supporters of gas heating is the threefold (at least) difference in monthly payments for gas and electricity for the same conditions and areas. However, supporters of electric heating have their own arguments - the price of a gas boiler is approximately 6 times higher than that of an electric one.

These are only primary costs; repair work will again require gas equipment owners to shell out large sums of money . But here there are some caveats - if a non-volatile gas boiler is used, the amount of costs is significantly reduced.

It is difficult to say unequivocally which boiler is better. Both types depend on the supply of fuel and electricity. The state of power grids, especially in remote regions, is difficult.

They are overloaded and need urgent updating . Relying on them for such an important matter is risky. In addition, the longer the service life, the more noticeable the difference in costs.

The advantage of gas units becomes indisputable . This allows, with some reservations, to recognize the primacy of gas heating over electric heating.

Online calculator

The most advanced manufacturers have thought about the comfort of consumers by placing online calculators on their websites that make it easy and quick to find out the required performance of gas equipment. For the calculation, enter the following information:

the temperature that the consumer wants to have in the house;
average outdoor temperature in the coldest week;
availability of hot water supply;
number of storeys;
ceiling height;
floor material;
the thickness of the walls and the materials from which they are built;
length of walls;
number of window openings;
window features - design details;
window dimensions.

By filling in the fields, you can quickly calculate the calculated value of the heating capacity.

Types of devices for home

There are many design options for gas boilers designed for use in autonomous systems.

They are designed for use in different conditions, have several functional capabilities and can be divided according to appropriate characteristics.

According to the set of functions, gas boilers are divided into:

single-circuit . They are only capable of heating the coolant for the heating system;
double- circuit In parallel with heating the coolant, hot water is prepared for domestic needs.

By installation type:

wall- mounted Installed in a hinged manner on solid walls or special support frames;
floor . No special installation is required, the maximum is a non-flammable stand.

By type of power supply:

volatile . To power the control board, sensor system, pump and fan, the boiler must be connected to the network;
non-volatile . They do NOT require a power supply; they operate only on a mechanical principle.

By heat transfer method:

convection _ The usual operating principle is by heating the coolant using a gas burner;
condensation _ Before the main heating, the coolant is prepared using thermal energy obtained by condensing moisture from the exhaust smoke. The design is effective only in appropriate conditions, when the difference in temperature outside and inside the room does not exceed 21°;
parapet _ These units themselves are sources of heat, acting like a stove. There are holes on the body through which hot air comes out, heating the room.

By type of combustion chamber:

atmospheric _ This is an old type of combustion chamber where air is taken from the room and smoke is removed naturally through a standard chimney;
turbocharged _ Air supply and smoke exhaust are produced by a built-in turbofan. This type is more modern, clean air is provided in the room, and there is no specific burning smell.

IMPORTANT!

All existing structures can demonstrate maximum efficiency and durability only when the appropriate conditions are created. When choosing, you should take into account where and how the boiler will operate, whether it will be able to provide full power and productivity.

Ariston CARES X 24 FF

Having two heat exchangers, the dual-circuit Ariston CARES X 24 FF heats both the room and the water. This convection-type unit with a chimney, which is a type of turbocharged unit, is installed on the wall, so the device does not take up much space. The device is able to heat 200-250 square meters of area and runs on two types of gas: natural and liquefied. The closed combustion compartment of this flow-type boiler, combined with electronic ignition, ensures safe operation.

Advantages:

An eight-liter expansion tank provides efficient heating.
The efficiency reaches 93.7%, which indicates cost-effectiveness and efficiency.
The unit can serve for a long time thanks to the stabilizing function and “anti-freeze” function that prevents damage from voltage surges.
The device provides heating in the circuit, which is designed to supply water, up to a maximum of 60 degrees and a minimum of 36. And the heating of water in the heating pipes reaches a maximum of 82 degrees and a minimum of 35. All this ensures comfortable adjustment.
Controlling the device and setting modes is comfortable thanks to the electronic panel with touch buttons. The screen shows data about the operation of the device.

Disadvantage - the unit is not equipped with a coaxial set, for example, Ariston 60/100-750.

Popular manufacturing brands

The efficiency and economy of gas heating is confirmed by the high demand for gas boilers.

A large number of companies produce this type of equipment. European companies are leading in this direction, but manufacturers from Southeast Asia and Russia are practically not lagging behind them. The number of firms is large, which creates serious competition between them.

The most famous companies are::

Vaillant . A well-known German brand that produces reliable and high-quality gas boilers;
Buderus . A company from Germany produces high-quality heating equipment of a high level;
Viessmann . Another German company whose products are highly valued by users all over the world;
Ariston . The Italian company is currently a subsidiary of Indesit.
Baxi . Another well-known company from Italy;
Protherm . Slovak company. Known for naming a series of gas boilers after animals;
Navien . Korean manufacturer of inexpensive and high-quality gas boilers;
ZhMZ . The abbreviation “Zhukovsky Machine-Building Plant” is well known in Russia. Non-volatile boilers from this manufacturer are characterized by stable operation and low prices;
Lemax . The company from Taganrog (Russia) produces gas boilers of high quality and affordable cost.

The list of companies producing gas heating equipment is far from complete.

New companies are constantly emerging, and companies are merging into single holdings . Changing the situation contributes to the development and improvement of equipment, allows us to achieve better performance and reduce prices.

How to choose and what to pay attention to?

The choice of a gas boiler is based on the size of the room and the needs of the people.

You need to pay attention to the following parameters:

power . It determines how efficient the boiler is. Depends on the area, calculated in the proportion of 1 kW per 10 sq.m. For example, a 12 kW boiler is capable of heating a room of 120 sq.m.;
number of circuits . This indicator indicates the functionality of the boiler;
installation method . As a rule, wall-mounted models are chosen for apartments where the installation location is the kitchen. Floor-standing models require a separate room, which is easier to provide in a private home;
type of ignition and burner . Electric ignition is preferable, but this is excluded in non-volatile models;
heat exchanger material and design . Most boilers are equipped with steel (stainless) components. There are also more efficient copper and cast iron designs. The former are used in wall-mounted models, the latter only in floor-standing models;
type of combustion chamber . A closed combustion chamber is preferable, which does not pollute the indoor air;
naturally aspirated or turbocharged . This indicator also applies to the combustion chamber and the method of smoke removal. Turbocharged models all have a closed chamber, while atmospheric models have an open chamber;
additional functions . There may be different options here, from remote control using an application on a smartphone, to a room thermostat. It is necessary to take into account that the cost of a boiler with additions is much higher, and whether they will be used or not is a big question.

NOTE!

You should not choose a boiler “for growth”. It must work at full capacity, otherwise components and parts will quickly fail.

Protherm Cheetah 23 MTV

Having two circuits, Protherm Cheetah 23 MTV will not only heat 230 square meters of room, but also heat the water. Thanks to the display, operation is controlled by the owner. A five-liter flow-through convection unit is mounted on the wall, so it does not clutter up the room.

Advantages:

It runs on two types of gas: liquefied and natural.
Electronic ignition ensures safe use.
Thanks to the ventilation burner, combustion products are discharged into the air duct. This guarantees safe use and clean air.
The heat exchanger, made of stainless steel, is not susceptible to corrosion or mechanical damage.
Monitor the operating condition and find faults in time using the installed diagnostic system.
Thanks to the three-mode temperature, the user has the opportunity to choose an option for winter, autumn-spring and vacation. In “vacation” mode, the device operates at minimum power levels, which prevents the apartment from cooling down, but also does not waste fuel.
The “antifreeze” function, which prevents the boiler from freezing, is always on.
The device also has a feature that prevents the pump or three-way valve from getting stuck.
The power of the device is adjustable, which allows you to save money. At the same time, the efficiency level is 92%.
Use the device comfortably at any time of the year: the temperature conditions of water and heating are regulated separately.
Operate the unit comfortably with electronic buttons and indicators displayed on the screen. It is possible to control the device using a thermostat.
The device displays the water pressure level and is also equipped with a tap designed to drain it.

Despite all the advantages, the boiler has a drawback - it cannot be controlled from a distance.

Advice: if the dacha is disconnected from gas, heat it using a solid fuel option.

TOP 5 single-circuit gas boilers

Single-circuit models are used either only for heating, or in conjunction with an external indirect heating boiler. This option allows you to obtain hot water without restrictions on water volumes and without temperature fluctuations. Let's consider several popular models:

Lemax Premium-10 10 kW

Single-circuit gas boiler of domestic production. Designed to heat 100 sq.m. The non-volatile design allows the unit to be operated without being connected to power supplies.

Basic parameters of the boiler:

installation type - floor;
energy consumption - independent;
Efficiency - 90%;
gas consumption - 1.2 m3/hour;
dimensions - 330x748x499 mm;
weight - 41 kg.

Advantages:

energy independence;
well-organized service and spare parts supply;
The design was created taking into account Russian climatic conditions.

Disadvantages:

when heated to 50°, condensation appears in small quantities;
there is no display, there is no way to obtain information about the state of the boiler components.

Non-volatile models are reliable and simple. They are quite safe, but require a high-quality chimney.

Lemax Premium-20 20 kW

Russian-made gas boiler . The power of the unit is 20 kW, which is suitable for rooms up to 200 sq.m. Equipped with fully mechanical control.

Boiler parameters:

installation type - floor;
energy consumption - non-volatile;
Efficiency - 90%;
gas consumption - 2.4 m3/hour;
dimensions - 556x961x470 mm;
weight - 78 kg.

Advantages:

reliability, stability;
Ease of Management;
low cost.

Flaws:

complex ignition;
you have to adjust the gas pressure so that there is no popping noise when igniting.

Domestic non-volatile boilers are much simpler and cheaper than their European counterparts. This is both a plus and a minus of the units.

Protherm Wolf 16 KSO 16 kW

Slovak gas boiler with a capacity of 16 kW. Optimally suitable for heating a house with an area of 160 sq.m.

Main technical characteristics:

installation type - floor;
energy consumption - independent;
Efficiency - 92.5%;
gas consumption - 1.9 m3/hour;
dimensions - 390x745x460 mm;
weight - 46.5 kg.

Advantages:

simplicity and reliability;
no need to connect power supply;
economical fuel consumption;
stable operation in automatic mode.

Flaws:

there is no indication of the state of the main components of the boiler;
ignition using a piezoelectric element is somewhat difficult.

Gas boilers made by Slovak engineers are highly rated by users, which confirms the high demand.

BAXI ECO-4s 1.24F 24 kW

Gas boiler from a famous Italian manufacturer . The power of the unit is 24 kW, which corresponds to a service area of 240 sq.m.

Options:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
Efficiency - 92.9%;
gas consumption - 2.73 m3/hour;
dimensions - 400x730x299 mm;
weight - 29 kg.

Advantages:

compactness, light weight;
reliability, stability;
full control over all systems and components using self-diagnosis;
There is a display showing all the parameters of the unit, both current and permanent.

Flaws:

when the power supply is turned off, the boiler operation stops;
high price for the boiler itself and for spare parts.

Italian heating technology is considered elite . It successfully competes with German models in all respects, enjoys well-deserved recognition and high demand among buyers.

Lemax Leader-16 16 kW

Russian single-circuit non-volatile boiler. Its power is 16 kW, which allows you to heat rooms up to 160 sq.m.

Main characteristics:

installation type - floor;
energy consumption - independent;
Efficiency - 90%;
gas consumption - 1.9 m3/hour;
dimensions - 431x856x515 mm;
weight - 95 kg.

Advantages:

stable, sustainable work;
low cost of the boiler and repair work;
independence from power supply.

Flaws:

minor flaws made during assembly;
heavy weight.

Floor-standing gas boilers are not limited in the weight and size of units, which allows you to create more powerful and durable units.

Ferroli Domina F 24 N

Ferroli Domina F 24 N attracts with its sophisticated design with smooth lines. This device is double-circuit, so it not only supplies heating, but also heats water.

Made of copper, the heat exchanger is coated with a special alloy containing aluminum, which protects it from corrosion. The steel combustion chamber is also protected with the same anti-corrosion coating. All this adds years of service life to the device.

Advantages:

The ignition is not equipped with an igniter, but is powered by electricity, which, in combination with ionization electrodes, ensures safe use.
Thanks to a technique that prevents blocking of the pump installed in the circuit intended for heating operation, the unit does not stop supplying heat: as soon as a day passes, the pump starts, even if the boiler is inactive.
Even if the device is turned off, it will not freeze thanks to the technology that prevents this: go on vacation calmly, leave the dacha in the cold - the device will not break.
The device is compatible not only with natural gas, but also with liquefied gas, which expands its operational capabilities. Remember: to work with liquefied gas, a special kit is required.
Thanks to the efficiency of over 90%, fuel savings are achieved.
In addition to the fact that the device is equipped with a microprocessor and is controlled using an electronic panel, the user has the opportunity to connect a remote system and control the device with a remote control.
Easy to maintain: the “filling” of the boiler is located so that it becomes accessible from its front part.
The device self-diagnoses, which increases the safety of use: in the event of a malfunction, the corresponding error code is displayed on the display. The LED screen also shows the set climate mode.

Disadvantage: this boiler has mechanical control levers, which reduces the accuracy of determining the temperature regime.

Interesting to know: How to choose an oil heater?

TOP 5 double-circuit gas boilers

Double-circuit boilers are considered the most preferred option among users.

This is true, although for families with a high need for hot water it is better to use single-circuit models with an external storage tank. Double-circuit units are convenient for small families or for use in public buildings. Popular models:

Vaillant turboTEC pro VUW 242/5-3 24 kW

German boiler from one of the most reliable manufacturers. It has a power of 24 kW, allowing you to heat rooms up to 240 sq.m. with simultaneous supply of hot water.

Unit parameters:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
heat exchanger type - separate (primary copper and stainless secondary);
Efficiency - 91%;
gas consumption - 2.8 m3/hour;
dimensions - 440x800x338 mm;
weight - 40 kg.

Advantages:

fully provides housing with heat and hot water;
reliable stable operation;
developed network of service centers.

Flaws:

needs power supply stabilization;
high price for boilers and spare parts.

Vaillant units are considered the most stable and reliable in operation. This is confirmed by ordinary users and service specialists.

Buderus Logamax U072-12K 12 kW

Gas boiler made in Germany . It belongs to the elite examples of European heating technology. The power is 12 kW, allowing you to heat 120 sq.m.

Characteristics:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
Efficiency - 92%;
heat exchanger type - separate (primary copper, secondary stainless);
gas consumption - 2.1 m3/hour;
dimensions - 400x700x299 mm;
weight - 29 kg.

Advantages:

stable and reliable operation;
no noise;
Ease of Management.

Flaws:

high price;
the need to use a power supply stabilizer and a water filter.

If you do not immediately install the filter units and stabilizer during installation and first start-up, you can quickly damage the unit and incur unnecessary costs for repairs and restoration of the boiler.

Bosch Gaz 6000 W WBN 6000- 12 C 12 kW

Gas double-circuit convection boiler with electronic control. Designed for rooms up to 120 sq.m., since its power is 12 kW.

Characteristics:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
Efficiency - 93.2%;
heat exchanger type - separate (primary copper, secondary stainless);
gas consumption - 2.1 m3/hour;
dimensions - 400x700x299 mm;
weight - 28 kg.

Advantages:

reliability, stability;
no noise;
low gas consumption.

Flaws:

high cost of spare parts and repair work;
demands on the quality of water and power supply.

Bosch products are known all over the world and need no introduction . The quality and reliability of heating equipment are considered benchmarks and serve as an example for other manufacturers.

BAXI LUNA-3 240 Fi 25 kW

Italian double-circuit convection boiler. With a power of 25 kW it is capable of heating an area of up to 250 sq.m.

Options:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
Efficiency - 92.9%;
heat exchanger type - separate (copper-stainless steel);
gas consumption - 2.84 m3/hour;
dimensions - 450x763x345 mm;
weight - 38 kg.

Advantages:

reliability;
high performance;
high-quality components and parts of the unit.

Flaws:

high cost;
The boiler dimensions are too large for a wall-mounted model.

Italian boilers are famous for their quality and reliability. However, to work in Russian conditions it is necessary to use additional equipment - a stabilizer and filter units.

Navien DELUXE 16K 16 kW

Korean boiler, characterized by relatively low cost and high quality. With a power of 16 kW, it is capable of heating 160 sq.m. area.

Boiler characteristics:

installation type: wall-mounted;
power consumption - 220 V 50 Hz;
Efficiency - 91.2%;
heat exchanger type - separate (both units are made of stainless steel);
gas consumption - 1.72 m3/hour;
dimensions - 440x695x265 mm;
weight - 28 kg.

Advantages:

reliability, high build quality;
relatively low price;
adapted to Russian conditions.

Flaws:

high noise level (relative);
Some parts are made of unreliable plastic.

South Korean boilers belong to the budget segment of heating technology. However, their quality is not inferior to their European counterparts, and the price is noticeably lower.

Immergas Eolo Mythos 24 2 E

Flow-through, belonging to a type of coaxial Immergas Eolo Mythos 24 2 E, removes products resulting from combustion in a forced way. This two-circuit model can supply heating to a house with dimensions not exceeding 240 square meters. meters. The option is installed on the wall, so it does not take up much space.

Advantages:

Due to the fact that the burner is ignited electrically, comfort and safety of operation is ensured.
The device is equipped with an option designed to check the quality of its operation and detect faults. The option works automatically, and a digital indicator displays the results.
Thanks to “antifreeze” the unit is protected from freezing.
Adjust the temperature of water and heating separately and precisely with unity thanks to convenient electronic buttons.
It is possible to connect a home thermostat to the device to control the “weather”.

The downside of the unit is that it is single-fuel - compatible with natural gas.

TOP 5 energy-independent gas boilers

Non-volatile boilers are a good choice for working in remote villages or regions with overloaded and dilapidated electrical networks. They continue to work in the event of a sudden power outage and do not require high costs for repairs or replacement of failed components. Let's look at the most popular models:

Lemax Patriot-12.5 12.5 kW

Single-circuit parapet gas boiler. Equipped with openings in the housing that allow heated air to escape outside.

This makes the boiler itself similar to a convector, heating the room without the need to install radiators . The boiler power is 12.5 kW, which is suitable for rooms of 125 sq. m.

Its parameters:

installation type - floor;
energy consumption - independent;
Efficiency - 87%;
gas consumption - 0.75 m3/hour;
dimensions - 595x740x360 mm;
weight - 50 kg.

Advantages:

simplicity of design, reliability;
low fuel consumption;
easy controls;
low price.

Flaws:

there is no complete information about the condition of the unit components. There is only a pressure gauge. indicating gas pressure;
it is necessary to install a traditional type chimney.

Domestic boilers are optimal for Russian climatic and technological conditions. They are unpretentious and reliable, do not require expensive repairs or maintenance.

Lemax Leader-25 25 kW

Convection gas boiler with a capacity of 25 kW . Designed for use in rooms up to 250 sq.m. The unit is single-circuit, with a cast iron heat exchanger and mechanical control.

Its parameters:

installation type - floor;
energy consumption - independent;
Efficiency - 90%;
gas consumption - 1.5 m3/hour;
dimensions - 515x856x515 mm;
weight - 115 kg.

Advantages:

strength, reliability of design;
stability, smooth operation;
Italian components.

Flaws:

large weight and size;
Some users find the ignition procedure unnecessarily complicated.

Boilers with a cast iron heat exchanger are characterized by smooth operation and the absence of sudden temperature changes.

Lemax Leader-35 35 kW

Another domestic boiler designed for large rooms . With a power of 35 kW, it is capable of heating an area of up to 350 sq.m., which is suitable for a large house or public space.

Boiler parameters:

installation type - floor;
energy consumption - independent;
Efficiency - 90%;
gas consumption - 4 m3/hour;
dimensions - 600x856x520 mm;
weight - 140 kg.

Advantages:

high power, ability to heat a large room;
stable and efficient work;
double-circuit boiler provides heat and hot water at the same time.

Flaws:

large size and weight, requiring a separate room;
gas consumption is quite high.

High-power boilers are often used to heat several apartments or houses. This reduces the financial burden on homeowners, since fuel payments are shared equally by everyone.

MORA-TOP SA 20 G 15 kW

Gas convection boiler manufactured by Czech engineers. The power of the unit is 15 kW, suitable for work in a house with an area of up to 150 sq.m.

Main settings:

installation type - floor;
energy consumption - independent;
Efficiency - 92%;
gas consumption - 1.6 m3/hour;
dimensions - 365x845x525 mm;
weight - 99 kg.

Advantages:

independence from electricity supply;
stability of work;
The power is suitable for most medium-sized private houses.

Flaws:

an atmospheric burner requires a normal chimney and does not allow drafts in the room;
relatively high price.

Compared to their Russian counterparts, European boilers are noticeably more expensive. Users note excessive costs, as well as interruptions in the supply of spare parts.

Siberia 11 11.6 kW

Domestic single-circuit gas boiler. Suitable for small rooms up to 125 sq.m. This is due to the boiler power of 11.6 kW.

Specifications:

installation type - floor;
energy consumption - independent;
Efficiency - 90%;
gas consumption - 1.18 m3/hour;
dimensions - 280x850x560 mm;
weight - 52 kg.

Advantages:

stable work;
unpretentious, economical boiler. Fuel consumption is noticeably lower than that of analogues from other manufacturers;
ease of management and maintenance;
relatively low price.

Flaws:

the declared indicators cannot always be achieved, the boiler power is sometimes not enough;
Difficult and inconvenient ignition.

Non-volatile boilers are optimal in Russian conditions. In cold weather it is too dangerous to remain without heating, so the independence of boilers is highly valued by users.

TOP 5 gas boilers made in Russia

Russian gas boilers did not stand out too much among similar products in the budget segment. However, recently there has been a clear increase in the quality and capabilities of Russian heating engineering.

Successful and reliable designs have appeared, characterized by stable and durable operation . A separate advantage should be considered the low cost and availability of spare parts, which increases the demand for units. Several popular models:

Lemax Patriot-10 10 kW

The unit is of relatively low power, suitable for an apartment or cottage. It is capable of developing 10 kW, which allows heating 100 sq.m.

Unit parameters:

boiler type - parapet;
functionality - single-circuit;
Efficiency - 90%;
power - 10 kW;
dimensions - 595x740x360 mm;
weight - 50 kg.

Advantages:

energy independence;
reliability, stable operation without failures;
low cost of the boiler and spare parts.

Flaws:

difficulty of ignition;
it is impossible to monitor the condition of components and parts without stopping the system and disassembling the boiler.

Low-power boilers work well in apartments or country houses, where they have optimal operating conditions.

Lemax Premium-30N 30 kW

Floor-standing non-volatile gas boiler with a power of 30 kW. Designed to heat an area of 300 sq.m.

Its parameters:

boiler type - convection;
functionality - single-circuit;
Efficiency - 90%;
power - 30 kW;
dimensions - 470x961x556 mm;
weight - 83 kg.

Advantages:

high power;
ease of setup and adjustment;
For such power the cost is very low.

Flaws:

high fuel consumption;
large weight and size.

High-power boilers can be connected in a cascade, forming complexes for heating large areas.

Lemax Premium-12.5N 12.5 kW

Gas floor-mounted, non-volatile boiler for heating small houses or apartments. Designed to work in rooms up to 125 sq.m.

Unit characteristics:

boiler type - convection;
functionality - single-circuit;
Efficiency - 90%;
power - 12.5 kW;
dimensions - 416x744x491 mm;
weight - 60 kg.

Advantages:

profitability, operational efficiency;
it is possible to install a forced-air burner and an external turbofan to enhance traction;
relatively low price.

Flaws:

it is inconvenient to light the burner;
you have to frequently clean the open combustion chamber.

Some users consider Russian boilers to be too simple and primitive. This belief changes after the first breakdown, when the cost of repairing an imported boiler forces you to look at domestic analogues with different eyes.

ZhMZ AOGV-17.4-3 Comfort N

Non-volatile convection gas boiler designed for heating rooms up to 140 sq.m.:

boiler type - convection;
functionality - single-circuit;
Efficiency - 88%;
power - 17 kW;
dimensions - 420x1050x480 mm;
weight - 49 kg.

Advantages:

reliable and stable operation;
good set of parameters;
independence from connection to the power supply network.

Flaws:

needs a separate room with a chimney.

Boilers from the Zhukovsky plant are known for their reliability and simplicity of design. They are in wide demand among buyers.

Lemax PRIME-V20 20 kW

Compact boiler for heating rooms up to 200 sq.m. and hot water supply.

Options:

boiler type - convection;
functionality - dual-circuit;
Efficiency - 92.5%;
power - 20 kW;
dimensions - 430x770x268 mm;
weight - 29 kg.

Advantages:

optimal set of qualities;
low price;
simplicity and reliability of design.

Flaws:

A voltage stabilizer is needed, since the boiler is volatile.

Domestic units seem inconvenient and difficult to use to many. However, these shortcomings are more than compensated for by the reliability and efficiency of the boilers.