Hit parade: Non-volatile gas boilers for the home

Rating of the TOP 12 best floor-standing gas boilers of 2021

This rating includes the best floor-standing gas boilers for heating according to experts and ordinary users.

The best floor-standing gas boilers for heating an area up to 120 sq. m.

To heat a house of about 120 square meters. m, experts advise choosing a gas boiler with a maximum thermal power of 12.5-30 kW. Our rating includes the most economical devices with high efficiency.

Vaillant atmoVIT VK INT 164/1-5 16.9 kW single-circuit

Rating: 4.9

Experts in the field of heating call the German gas boiler Vaillant atmoVIT VK INT 164/1-5 the standard of reliability and durability. The 16.9 kW model is equipped with a built-in one-stage burner; the device can be used both in heating systems and for heating tap water. Experts consider the main advantage of the boiler to be a cast iron heat exchanger, which is corrosion resistant and has a long service life. Air is taken from the room, which simplifies the installation of the chimney. Due to German manufacturing quality and high efficiency (up to 92%), the device becomes the winner of our rating.

Users note the ease of operation of a gas boiler, the presence of safety systems, height-adjustable legs, and the ability to operate on liquefied gas. The only disadvantage of the model is the high price.

Advantages

• cast iron heat exchanger;
• German quality;
• reliability;
• durability.

Flaws

• high price.

BAXI SLIM 1.300 iN 29.7 kW single-circuit

Rating: 4.8

The Italian gas boiler BAXI SLIM 1.300 iN stands out from its competitors with its high thermal output (29.7 kW). In this indicator, he beats even the winner of the rating. But the efficiency of the model is slightly lower (90%), which determined the final place on the pedestal. The primary heat exchanger is made of cast iron; the manufacturer has provided a special connector for connecting external control. Among the disadvantages, experts cite the large weight of the device (126 kg) and high consumption of natural gas (3.49 cubic meters per hour). To connect a single-circuit boiler, a 220 V outlet is required.

Domestic homeowners speak flatteringly about the performance of the Italian boiler, its stylish appearance, and ease of operation. Among the disadvantages, they note high gas consumption and high price.

Advantages

• high power;
• cast iron heat exchanger;
• electronic control;
• high-quality assembly.

Flaws

• high gas consumption;
• high price.

KITURAMI STSG 13 GAS

Rating: 4.7

The floor-standing gas boiler from South Korea KITURAMI STSG 13 GAS has a high level of safety and comfort. This double-circuit model represents the optimal price-quality ratio for heating a house with an area of ​​about 120 square meters. m. The manufacturer made heat exchangers from stainless steel, which were welded using patented technology. The maximum temperature in the heating line reaches 85°C, water for domestic needs is heated to 80°C. The device is equipped with electronic control; a remote thermostat can be installed in any room of the house. The model deservedly takes third place in our ranking.

Users love the modern features of a gas boiler. This is an advanced self-diagnosis, delayed start. The advantages include the lightness of the boiler and stylish design. One of the disadvantages is noise.

Advantages

• high power;
• electronic control;
• many functions;
• acceptable price.

Flaws

• noisiness.

Protherm Volk 12 KSO 12.5 kW single-circuit

Rating: 4.6

The Slovak floor-standing boiler Protherm Volk 12 KSO has a good reputation among Russian homeowners. This single-circuit model with a power of 12.5 kW has the highest efficiency in our rating (92.5%) and the lowest cost. The device is simply irreplaceable in those regions where power outages often occur, since it only needs gas to operate. Experts believe that the manufacturer has managed to create a reliable budget boiler that will create comfort in a house of up to 120 square meters. m. The model stopped one step away from the top three rating due to the lowest maximum coolant temperature (80°C).

Most users are satisfied with the ease of connecting the boiler, low cost, and reliability. The disadvantages include mechanical control and a steel heat exchanger.

Advantages

• high efficiency;
• simple installation;
• low price;
• reliability.

Flaws

• mechanical control;
• steel heat exchanger.

Lemax Premium-12.5B 12.5 kW dual-circuit

Rating: 4.5

The Russian double-circuit floor-standing boiler Lemax Premium-12.5B looks decent against the background of imported competitors. First of all, the manufacturer made the device accessible to the general public. The second advantage of the model, according to experts, is energy independence. With a power of 12.5 kW and an efficiency of 90%, the unit can heat a house with an area of ​​up to 120 square meters. m. Among the advantages of the Russian development, users point to low natural gas consumption (1.5 cubic m/h). This was achieved thanks to the installation of components from such well-known European companies as SIT and Polidoro. The model closes our rating of low-power gas boilers.

Of course, in terms of comfort and modern options, the device is inferior to the leaders in the rating. It has mechanical controls and a steel heat exchanger.

Advantages

• energy independence;
• affordable price;
• efficiency;
• ease of operation.

Flaws

• mechanical control;
• steel heat exchanger.

How to choose a floor-standing gas boiler?

Focus on the following parameters:

• Power . An average power reserve will allow the boiler to last not 1 or 2 years, but significantly longer. Add 25% to the optimal power indicator, and the result will be the very figure from which you should build.
• Material of manufacture . Gas boilers made of cast iron last the longest. But get ready to shell out a hefty sum for such a boiler.
• Device type . A condensing boiler is cheaper and more economical.
• Management . Choose a model with manual temperature control: sooner or later you will want to choose the appropriate indicators yourself.
• Safety . The boiler must have protection systems: gas control (which turns off the unit if there is a gas leak), protection against hypothermia and overheating.

Popular manufacturers of gas boilers: Neva, Lemax, ZhMZ, Navien, Protherm, Baxi, Viessmann, Buderus, Vaillant.

Secrets of choosing a floor-standing boiler

Of course, the first thing that draws attention is the power of the gas unit. It is usually suggested to calculate the required power as follows: 1 kW of power per 10 sq.m. This is an average value that does not take into account the height of the ceiling, the number of windows in the room, or thermal insulation. Only a specialist can make the correct calculation.

Some advise purchasing a boiler with a small power reserve. The stock should be small, otherwise equipment will wear out much earlier. For single-circuit boilers, the power reserve is no more than 15%, for double-circuit boilers – no more than 25%.

The most economical boilers include condensing models; they consume fuel 15-30% less than traditional ones. Electronic ignition also saves money. Piezo ignition will lead to excessive gas consumption due to the constant operation of the burner. An electronic burner does not need this, so the cost is of course higher, but the quality and service life are appropriate.

It is necessary to take into account the area of ​​the building: for a small building it is better to purchase a double-circuit boiler, provided that hot water supply is necessary. For large areas, the power of a double-circuit boiler will not be enough and the safety of the system may suffer.

The best material to choose is cast iron or steel. It will last longer. The copper heat exchanger will have to be replaced after some time. More often they choose a unit made of cast iron.

The higher the power, the higher the price. It is considered normal if the efficiency of a floor-standing gas boiler is from 80 to 90%. Condensation models - from 104 to 116% (according to passport data). The higher the efficiency, the less fuel and more efficient operation.

Boilers with automatic control are safer and more convenient. There is no need to control their work. This is a very expensive system. A more budget option involves constant monitoring of work, which is not always convenient.

The size of the boiler, of course, is chosen based on the area of ​​the room where it will stand. The choice is huge. It is important to remember that all additional equipment has easy access.

Review of the best models in terms of price-quality ratio

Lemax Premium-30B 30 kW

The Premium series boiler is a Russian unit, powerful and reliable. In the first year of its release on the market, it received many flattering reviews from customers.

The controls are electronic and intuitive, capable of heating a large living area. The unit itself is dual-circuit, compact, and takes up little space. The build quality is excellent. Heat exchanger material is steel coated with anti-corrosion enamel, fuel is natural gas (flow rate - 3.5 cubic meters per hour).

There is protection (gas control), a thermometer and overheating protection. Warranty period - 3 years. This model has proven itself well in 2021.

Specifications:

• Maximum thermal power: 30 kW;
• Heated area: 300 sq.m;
• Efficiency: 90%;
• Weight: 88 kg;
• Dimensions: 556x961x470 mm.

pros

• easy to buy spare parts for repairs;
• powerful;
• economical;
• no problem with cheap fuel.

Minuses

• makes noise during operation.

Lemax Premium-30N 30 kW

Single-circuit boiler with good power, packed in a steel box (steel thickness - 2 mm).

No electrical connection required. Burner - micro-flare injection POLIDORO, Italian automatics. Anti-corrosion enamel can withstand temperatures up to 950°C and does not deteriorate even under aggressive environmental influences.

The temperature regulator is fixed on the front panel of the boiler. The top panel can be easily removed. There is a gas control function. Warranty - 3 years.

Specifications:

• Maximum thermal power: 30 kW;
• The approximate area of ​​the heated room is 300 sq.m;
• Efficiency: 90%;
• Weight: 77 kg;
• Dimensions: 556x961x470 mm.

pros

• low gas consumption;
• there is enough power to spare;
• you can choose a comfortable thermal mode yourself;
• affordable;
• pleasant appearance;
• easy setup.

Minuses

• There is no protection against overheating and freezing.

BAXI SLIM 1.150 i 14.9 kW

Single-circuit floor-standing unit with average efficiency and good protective functions: gas control, air vent, safety valve. There is frost protection, flame modulation, automatic ignition and underfloor heating.

There is a display on the front panel. The heat exchanger is made of cast iron. The combustion chamber is open. An indirect heating boiler with additional piping can be connected to the boiler.

The warranty period is 24 months. The fuel can be either natural or liquefied gas.

Specifications:

• Dimensions: 350x850x520 mm;
• Thermal power: 8.50 - 14.90 kW;
• Weight: 93 kg.

pros

• electronic control;
• reliable;
• economical;
• pressure gauge;
• pump blocking protection.

Minuses

• high price.

Review of the best single-circuit models

Lemax Leader-25N 25 kW

The stylish boiler is made in red and white colors and does not require a network connection. It has all the necessary protection programs, is reliable and of high quality.

The cast iron heat exchanger perfectly maintains the temperature and, thanks to its high heat transfer, warms up the home well. The starting system operates smoothly and the controls are simple.

The temperature regulator is installed on the front panel. The micro-torch burner ignites without problems. Fuel is natural gas.

Specifications:

• Max. thermal power: 25 kW;
• Heated area: 240 m²;
• Dimensions: 515x856x515 mm;
• Efficiency: 90%;
• Max. thermal load: 30 kW.

pros

• automatic Nova;
• gas control;
• overheat protection;
• pressure gauge

Minuses

• very heavy (115 kg).

Lemax Wise 25 25 kW

An ergonomic boiler with low gas consumption (for this level of units) and a set of protection programs, reliable and relatively inexpensive. There is a convenient display and power indicator.

The installed automation system, made in Italy, is resistant to voltage surges, does not make noise, and allows you to connect additional devices (for example, a turbo nozzle, circulation pump, etc.).

The warranty period is 24 months.

Specifications:

• Max. thermal power 25 kW;
• Efficiency: 90%;
• Weight: 116 kg;
• Dimensions: 515x860x520 mm.

pros

• gas control protection;
• it is possible to connect external control;
• auto diagnostics;
• flame modulation;
• frost protection;
• power-on indication.

Minuses

• heavy weight.

Lemax Premium-20 20 kW

Inexpensive and quite simple, but with a standard set of functions, a boiler for a house with an area of ​​200 sq.m.

The heat exchanger is made of high-strength steel. Powerful, with good heat dissipation. Gas consumption is economical, the removable panel allows you to clean it yourself.

The model is equipped with automatic ignition. Safe: functionality includes gas control, protection against draft blowing and protection against heat exchanger overheating. It does not take up much space, as it is small in size. Chimney diameter is 130 mm.

Specifications:

• Boiler warranty: no more than 3 years;
• WxHxD: 556x961x470 mm;
• Gas consumption: 2.4 cubic meters m/hour;
• Thermal power (maximum): 20 kW.

pros

• intuitive control panel;
• the boiler is easy to operate;
• affordable price;
• high efficiency.

Minuses

• makes noise.

The best floor-standing gas boilers for heating an area of ​​up to 200 - 250 sq. m.

When heating a large house, a number of requirements are placed on a gas boiler. First of all, it must be powerful, but at the same time economical. Typically, such parameters are observed in models with high efficiency. Here are some attractive devices.

Vaillant atmoVIT VK INT 254/1-5 25 kW single-circuit

Rating: 4.9

The gas boiler from Germany Vaillant atmoVIT VK INT 254/1-5 has proven itself to be excellent in the Russian climate. The single-circuit device is equipped with an atmospheric injection burner; air enters the combustion chamber without the help of a fan. Experts consider the strengths of the model to be a cast iron heat exchanger and high efficiency (up to 94%). The floor-standing boiler is created in accordance with the latest advances in the field of heating equipment; it has electronic control and a self-diagnosis system. The device works equally effectively on both suitable gas and liquefied blue fuel. The device becomes the winner of our rating.

Domestic homeowners are satisfied with the power of the gas boiler, its functionality and reliability. The model has no particular disadvantages.

Advantages

• high efficiency;
• cast iron heat exchanger;
• electronic control;
• reliability.

Flaws

• not detected.

BAXI SLIM 2.300 i 29.7 kW dual circuit

Rating: 4.8

The double-circuit gas floor-standing boiler BAXI SLIM 2.300 is one of the best models with a built-in boiler. The Italian development is equipped with a 50 liter tank, where a supply of hot water is stored. The manufacturer took care of the safety of its product by equipping the device with overheating protection, a closed combustion chamber, a draft sensor and a pump lock. Experts appreciated the adaptation of the model to Russian conditions, giving the boiler second place in our rating. It is inferior to the winner in efficiency (90%), and the device weighs about two hundred kilograms.

Users speak flatteringly about the functional content of the device, economical consumption of natural and liquefied gas, and ease of installation. The main disadvantage for domestic homeowners is the high price.

Advantages

• high power;
• built-in tank;
• safety;
• adaptation to Russian conditions.

Flaws

• high price;
• heavy weight.

Buderus Logano G124 WS-20 20 kW single-circuit

Rating: 4.7

The German gas boiler Buderus Logano G124 WS-20 closes the top three in our rating. The main advantage of this heating device, according to experts, is efficiency. So the consumption of natural gas is 2.3 cubic meters. m/h, and liquefied gas consumption is at 1.71 kg/h. Such indicators are rare even in low-power gas boilers. The model is equipped with an electronic control unit, a cast iron heat exchanger, and has a connector for connecting external devices.

Domestic homeowners praise the floor-standing boiler for its reliability, efficiency, and ease of use. It is only important to connect the device through a voltage stabilizer in order to preserve the electronics during voltage surges.

Advantages

• efficiency;
• electronic control;
• cast iron heat exchanger;
• reliability.

Flaws

• afraid of voltage surges;
• high price.

Bosch Gaz 2500 F 25 25 kW single-circuit

Rating: 4.6

The single-circuit gas boiler Bosch Gaz 2500 F 25 is a German development, but the device is assembled in Russia. Thanks to this approach, we managed to get a reasonable price. Experts note the high efficiency of the model (92%), elegant appearance, and the presence of modern options. The consumer is offered built-in automation, modulating burner, display backlight, and protection against stalling of the draft. Only the use of a steel heat exchanger did not allow the device to rise higher in our rating.

Users are satisfied with the build quality, reasonable price, good power (25 kW), and functionality. The disadvantages include the sensitivity of the automation to voltage surges in a single-phase electrical network.

Advantages

• compactness;
• reasonable price;
• adapted to Russian conditions;
• built-in automation.

Flaws

• sensitivity to voltage surges;
• steel heat exchanger.

Protherm Bear 40 KLOM 35 kW single-circuit

Rating: 4.5

The Slovak floor-standing boiler Protherm Bear 40 KLOM is very popular in our country. Russian users liked it because of its versatility; the device runs on both natural and liquefied gas. Experts liked the cast-iron heat exchanger, the presence of protection against overheating and frost, the self-diagnosis function, and the modulated burner. At the same time, a powerful (35 kW) gas boiler is offered at an affordable price. Among the disadvantages, it is worth noting the high consumption of both natural (4.1 cubic m/h) and liquefied (3.3 kg/h) gas.

User reviews praise the device for its reliability, ease of maintenance, high-quality assembly, and the availability of any components for free sale. Only the boiler body is a little flimsy, and jams often occur during installation.

Advantages

• versatility;
• reliability;
• cast iron heat exchanger;
• ease of maintenance.

Flaws

• high gas consumption;
• thin-walled body.

Lemax Premium-20 20 kW single-circuit

Rating: 4.4

The domestic single-circuit floor-standing boiler Lemax Premium-20 closes the TOP 6 of our rating. The model received many positive reviews from homeowners. Among the advantages, experts highlighted low price, inexpensive maintenance, ease of operation and efficiency. With a power of 20 kW, the device consumes 2.4 cubic meters. m of natural gas per hour. The model is inferior to its competitors only in efficiency (up to 90%) and mechanical control method. The disadvantages include a steel heat exchanger.

Users like the simplicity of the design, which allows them to clean the boiler themselves and quickly. Residents of the outback choose Lemax Premium-20 for its energy independence and noiselessness. Some homeowners are dissatisfied with popping noises during ignition; sometimes they come across defective draft sensors.

Advantages

• low price;
• easy operation;
• efficiency;
• energy independence.

Flaws

• mechanical control;
• steel heat exchanger.

Review of the best dual-circuit models

ATON Atmo 10ЕВМ 10 kW

Trouble-free unit with mechanical control. High quality assembled. The combustion chamber is open, efficiency is 90%. The heat exchanger material is high-grade steel. Only natural gas is suitable as fuel. Automation - EUROSIT.

The coolant temperature range is 50-90 °C. The model operates completely silently, is easy to set on fire and rarely breaks. Chimney diameter - 110 mm. Capable of heating an area of ​​about 100 sq.m.

Specifications:

• Thermal power: 10 kW;
• Weight: 44 kg;
• Dimensions: 380x760x385 mm.

pros

• thermometer;
• gas control;
• inexpensive;
• long warranty period.

Minuses

• small heated area.

Protherm Bear 30 KLZ 26 kW

A massive double-circuit boiler with a full set of amenities: pressure gauge, thermometer, auto-ignition, gas control, flame modulation, auto-diagnostics. Included: built-in circulation pump and expansion tank.

In case the pump is blocked, special protection is installed. Indicators in the DHW circuit are 40-70 °C. Natural gas consumes 3 cubic meters. m/hour, liquefied - 2.4 kg/hour. A single-phase network extension is required.

Specifications:

• Thermal power: 18.20 - 26 kW;
• Parameters: 505x1385x730 mm;
• Weight: 155 kg.

pros

• warranty period: 730 days;
• electronic control;
• built-in boiler;
• overheat protection.

Minuses

• very heavy.

Lemax Premium-20B 20 kW

Budget model made of steel, impact-resistant and durable. The gas supply stops automatically in the event of a breakdown, just as the burner turns off when abnormally high water temperatures are detected.

Long warranty period (3 years). There is overheating protection, a thermometer on the body and gas control. The volume of gas consumed is 2.4 cubic meters. m/hour. The coolant can withstand a maximum of 90 degrees. Capable of heating 200 sq.m. premises.

Specifications:

• Dimensions: 556x961x470 mm;
• Weight: 83 kg;
• Claimed power 20 kW;
• Unit parameters: 556x961x470 mm.

pros

• inexpensive;
• large heated area;
• durable body;
• good build.

Minuses

• susceptible to corrosion;
• the main parameters can only be adjusted manually.

Bosch Condens 7000i W GC7000iW 14 PB 23

Small and smart: it will heat the house and save money.

Production: Türkiye | Heating area: 101-150 m² | Gas boiler type: condensing | Gas boiler power: 14 kW | Number of heating circuits: single-circuit | Protection class: IPX4D

Detailed specifications: Bosch Condens 7000i W GC7000iW 14 PB 23

Do you need a reliable heating unit for a small house? We invite you to pay attention to the single-circuit unit made in Turkey. The unit is characterized by compact dimensions (440x840x360 mm) and a wide range of functions for energy-efficient heating. The model can be installed in rooms with limited space (up to 150 m²).

Thanks to its wide modulation range (from 14% to 100%), the Bosch Condens 7000i W GC7000iW 14 PB 23 can be easily adapted to specific heating power requirements.

Condensation type model - the unit uses not only gas but also condensation steam as fuel. To obtain additional energy, a Bosch gas boiler converts steam into water.

The installation has a spectacular appearance in Hi-Tech design. The case is made in black color scheme. The control panel is located under the hinged lid. For service maintenance, no dismantling is required - all main units and components are accessible from the front.

The device is equipped with:

• circulation pump;
• three-way valve;
• expansion tank 12 l;
• safety valve to protect against increased pressure in the system.

The device is equipped with an acid-resistant silumin heat exchanger.

The model is designed to operate on main natural gas. After conversion, the Bosch brand unit can operate on liquefied gas. The installation is characterized by economical fuel consumption - consumption is 1.52 m³/hour (for liquefied gas 1.12 kg/hour).

The minimum thermal power of the unit is 2 kW. Weather-dependent control is provided, which allows you to minimize heating costs.

The manufacturer provides a warranty on the equipment for 2 years.

Expert comment: due to the wide range of coolant temperatures, the unit can work with “Warm Floor” systems and radiator heating. The possibility of remote wireless control is provided (thanks to the Bosch EasyControl control system with Bosch Wi-Fi thermal heads). Wi-Fi option sold separately.

Compare various models of the Bosch Condens 7000i W GC7000iW 14 series and choose units with suitable performance characteristics, design, and cost.

Review of the best non-volatile models

Lemax Patriot-10 10 kW

Russian boiler with a closed combustion chamber and an improved protection system. The functionality is simple, but it gets the job done. For individual heating of a small area, its power is quite enough.

Small steel heat exchanger. It consumes little gas and heats up well. The assembly is good. Mechanical control. The maximum coolant temperature is 80 °C. Weighs 50 kg. Chimney diameter is 250 mm.

Specifications:

• Service life: 3 years;
• Max. thermal power: 10 kW;
• Fuel: natural gas only;
• Dimensions: 595x740x360 mm.

pros

• durable;
• qualitative;
• affordable.

Minuses

• It cannot be used as a gas water heater, only for heating.

Lemax Premium-16 16 kW

Another inexpensive but high-quality model for those who only care about warmth and not “bells and whistles.” The carefully assembled box is coated with an inhibitory anti-corrosion compound and heat-resistant enamel.

Practical and reliable energy-independent model for an area of ​​up to 120 sq.m. Can be installed both in residential and non-residential premises. The temperature sensor is located on the top panel for user convenience. Weight - about 60 kg. Thermal power - 16 kW.

Specifications:

• Allowable heating area: 160 sq.m;
• WxHxD: 416x744x491 mm;
• Warranty period: 3 years.

pros

• easy controls;
• economical model;
• quickly warms up the home;
• convenient to clean.

Minuses

• a bit expensive for boilers of this level;
• volatile

Siberia 17 17.4 kW

A relatively cheap, domestically assembled miniature heating unit with Italian “stuffing”.

The media temperature sensor is located on the control panel. Weighs more than 50 kilograms, the heat exchanger has thick steel walls. Piezo ignition with flame control.

It is not capricious in maintenance, breakdowns (according to customer reviews) occur very rarely. High quality build. The combustion chamber is open. Compact, takes up little space.

Specifications:

• Thermal power: 17.40 kW;
• Area: 200 sq.m;
• Highest carrier temperature: 90 °C.

pros

• attractive design;
• compact;
• automation and burner made in Italy;
• inexpensive;
• high efficiency.

Minuses

• makes noise when ignited.

Floor-standing or wall-mounted gas boiler - which is better?

Let's look at the main differences between floor-standing and wall-mounted boilers:

• The efficiency of wall-mounted boilers is 90-94%, lower floor-standing boilers are 88-90%. This means that the lower the efficiency, the higher the energy consumption. Most floor-standing boilers are convection boilers. Their price is lower, they are also inexpensive to repair, but they are also less efficient. Boilers that are attached to the wall can be either convection or condensation. In condensation systems, the heat generated from combustion products and gases passes into the coolant, and not into the atmosphere, i.e. it is used efficiently (this requires the construction of a condensate drain, but this work is simple).
• The service life is affected by the material of the heat exchanger, and not by the number of structural elements and their connection in certain variations. Heavy cast iron is often used - a thick and very durable material that is not afraid of corrosion and is very durable. Such a boiler can operate for at least 20 years, or even 25. Copper or steel are used in suspended structures. Steel is cheaper than copper, but is thin, and will last 12-13 years. Whether it’s copper: units with copper elements last 5-8 years longer and conduct heat better, but they also cost significantly more.
• Fun fact: manufacturers generally prefer to create entire boiler rooms in miniature from wall-mounted boilers, and use floor-standing boilers to a minimum. Regarding dimensions: do not think that the larger and more massive the boiler, the better it works. Most often it happens just the opposite.
• Each region has its own nuances of power supply: a non-volatile boiler will continue to operate even in your area “the lights will be turned off.” Half of all floor-standing boilers on the market are non-volatile, and there are plenty to choose from. But wall-mounted ones require connection to the electrical network, without exception.
• Automation in wall-mounted boilers is better, so these types of models are safer and more convenient to use. They also have overheating protection, self-diagnostics, freeze protection and a lot of other useful functions. Floor-standing ones boast automatic ignition (rarely), overheating protection and gas control.
• Wall-mounted structures cannot work with some coolants, for example, antifreeze on copper and steel heat exchangers has a simply destructive effect. But the same antifreeze is perfect for floor-standing boilers.
• One- or two-stage burners are installed in floor-standing boilers (they can operate either in on/off mode, or with adjustment at 50 or 100% power), in wall-mounted boilers - modeled ones (the indicators can be adjusted by the user himself as he pleases). The situation with chimneys is this: since almost all floor-standing boilers have atmospheric burners and open combustion chambers, the chimney for them must be removed separately . The wall-mounted units have a convenient coaxial chimney.
• Mounted boilers are cheaper and there is more choice than floor-standing boilers. And they are easier to maintain.

From the above, we can draw the following conclusion: the most reliable are floor-standing mini-boilers, since they are unpretentious even with a serious “minus” outside the window and they have a more durable heat exchanger.

The best Russian manufacturers of gas boilers

ZhMZ

ZhMZ is the Zhukovsky Machine-Building Plant, specializing in the production of specialized aviation equipment for airfields and is the largest manufacturer of gas heating boilers for domestic use in Russia. The manufacturer's assortment includes over 30 models AKGV, AOGV, KOV, which are part of 3 lines: “Universal”, “Beetle”, “Comfort”.

The devices are manufactured by qualified personnel on modern equipment with a power of 11÷68 kW using imported automation units. The machines produced have high quality, environmental friendliness, technical level, as well as an affordable price and excellent consumer characteristics. All devices underwent sanitary and epidemiological examination and certification, after which they “received” permission from technical supervision authorities for production and sale.

Advantages:

• Thanks to the improvement of automatic units and heat exchanger design, air pollution has decreased and efficiency has increased to 89%.
• non-volatile ignition, which is relevant in places with power outages;
• flame burning indication and German automatic filling;
• availability of systems with natural and forced air supply;
• the ability to choose between liquefied and natural gas;
• gas pressure control and overheating protection;
• improved ergonomic and aesthetic parameters;
• there are no problems with spare parts;
• relatively low cost;
• warranty for a period of 3 years.

Flaws:

• low quality of manual welding - in contrast to automatic;
• noisiness.

Floor-standing convection devices in 1- and 2-circuit versions are not stuffed to the brim with electronics, but nevertheless they do their job well. These boilers are not without weaknesses, but they fully pay for themselves.

LEMAX

"Lemax" is a Creative and Production Association, consisting of several enterprises whose main activity is the manufacture of household gas equipment. The history of the company began in 1992 in the city of Taganrog.

After 25 years, the buyer is offered a wide range of products - gas boilers: wall-mounted Prime series with 10÷32 kW/h and efficiency ≈ 92%; floor-mounted steel “Premium” with powers of 7.5/70÷60/100 kW and “Patriot” (6÷20 kW), as well as cast iron “Leader” and Wise (16÷50 kW). Lemax has other lines in its arsenal that are no less in demand among customers: Premium N, Gazovik, Clever. In addition, only for heating you can always purchase a suitable 1-circuit version, and for DHW + O you can choose from 2-circuit modifications. Modern products are developed by the company's engineering department.

Advantages:

• use of components from well-known European manufacturers;
• adaptation for operation in Russian conditions - the gas pressure drop is taken into account, the voltage range is expanded, the board protection is strengthened, electrically independent units are created;
• sealed sound and heat insulation, facilitating correct installation in apartments;
• simple controls that can be controlled via the Internet;
• independence of the DHW heat exchanger;
• output of technical information in the required volume to the LCD display;
• constructive protection of vulnerable parts from the effects of scale and corrosion;
• use of composite materials in structures;
• wide service network – quick troubleshooting;
• elegant appearance, 2 or 3 year warranty depending on the model.

Flaws:

• sometimes it happens that when the burner is operating, the torch goes out;
• The device is sometimes “afraid” of corrosion.

Both externally and from the operational data, it is clear that the company’s specialists worked hard to create the boilers, and not in vain. The vast majority of users are satisfied with the devices. Sometimes some parts fail, but not more often than competitors.

Types of floor-standing gas boilers

There are several types:

• Single-circuit - in their connection diagram the boiler and the boiler do not depend on each other, i.e. this unit will act exclusively as a heating device. To warm water for, for example, washing, you will have to buy a boiler separately and invite a specialist to connect it to the boiler. A single-circuit boiler is inexpensive.
• The double-circuit one has 2 heat exchangers inside, due to which it heats water for domestic needs. It costs more.
• A condensing boiler is a high-efficiency unit, which means little money is spent on maintenance. But the boiler itself is expensive. In such a device, heat is released during the process of steam condensation.
• Convection is an option with low efficiency. The energy released when the gas burns heats the water. This unit is inexpensive, easy to install and easy to work with.

How to choose the power of a gas boiler?

Calculating the boiler power is also not difficult. The ideal is taken to be a normally insulated room with ceilings no more than three meters high, with pressure in the gas pipeline of approximately 14-15 mbar, excluding water heating. In this case, 1 kW is required per 10 square meters.

You should also take into account the region of residence (especially average winter temperatures), how many doors and windows there are in your apartment (house) (the so-called thermal conductivity is of interest here). Remember that the lower the minimum power of the unit, the more economical it will work.

In some cases, a boiler is required whose power is 1.5-1.7 times greater than that required under ideal conditions. Therefore, if you are not sure that you can calculate everything correctly, contact a specialist: he will draw up an individual project, taking into account all the features of your home and the environment.

Rating updated September 12, 2021.