Economical gas boiler for the home. Rating of the most economical gas boilers for heating a private house: how to choose? Voltage stabilizer for a gas boiler - needed or not

(function(w, d, n, s, t) ( w[n] = w[n] || ; w[n].push(function() ( Ya.Context.AdvManager.render(( blockId: "R-A -345261-6", renderTo: "yandex_rtb_R-A-345261-6", async: true )); )); t = d.getElementsByTagName("script"); s = d.createElement("script"); s .type = "text/javascript"; s.src = "//an.yandex.ru/system/context.js"; s.async = true; t.parentNode.insertBefore(s, t); ))(this , this.document, "yandexContextAsyncCallbacks");

A gas double-circuit boiler is an excellent alternative if there is no desire to connect to centralized heating. Such a device can be installed both in a city apartment and in a private house and use the advantages of its operation all year round. Our rating of the best models of double-circuit boilers will help you make the right choice.

Recently, double-circuit heating boilers have become relevant: they can simultaneously heat the building, supplying it with warm water. There are two coils in the design of the model, each of them is responsible for its own function. To answer the question of which wall-mounted gas boilers are better, consider the main criteria for selecting appliances:

1. Combustion chamber type. Among the products you can find models with an open and closed combustion chamber. The open type is used for buildings with a large area, as it takes air from the room. The closed type is suitable for apartments and country houses where a chimney is not required.
2. Power. It is calculated based on the area of ​​\u200b\u200bthe space, the height of the ceilings, the number of windows. The more ways of heat loss, the more powerful boiler is needed.
3. Performance. The more hot water intake points in the house, the higher the boiler performance should be.
4. Manufacturer. There are a number of models of domestic and foreign production on the market, which have equal quality indicators. It is better to give preference to trusted brands.
5. Service and Warranty. When choosing a boiler, it is worth considering the risk of breakdown and the possibility of purchasing spare parts in the region of residence.

Expert advice

Mikhail Voronov

Specialist in the field of household appliances, electronics, construction tools, goods for cars, sports and recreation, beauty and health.

The modern most popular models can be considered in our rating with a brief overview of the characteristics.

Rating of double-circuit wall-mounted gas boilers

The model from the Leberg brand opens our selection of the best wall-mounted gas boilers. This appliance is a convection boiler with a power of 20 kW. The design provides for a closed combustion chamber, a built-in circulation pump, an electronic control panel. The device also has a built-in expansion tank with a volume of 6 liters.

The maximum pressure for the heating circuit is 3 bar, while the maximum pressure for DHW is 6 bar. Of the functions, this boiler is equipped with flame modulation, auto-ignition, pressure gauge and thermometer. The user can be sure of their safety thanks to the function of gas control, anti-freeze, as well as protection against blocking the pump. Leberg Flamme 24 ASD is a wall-mounted boiler of good quality and workmanship, suitable for the home.

• Simplicity of design and management;
• Reliability;
• Availability of all necessary protective functions;
• Ability to adjust power.

• Not detected.

Gennady, 52 years old

We put this boiler to replace the old one, which worked out its 15 years. Never regretted this device. Firstly, it is domestically produced, reliable, and the quality of iron is at its best. Secondly, it perfectly fulfills the stated functions: I heat a two-story private house, it also heats water perfectly.

The seventh position in our hit parade for the best gas boilers is occupied by a model from firm Navien. This is a two-circuit unit with a maximum heating power of 13 kW. The device allows you to heat a room up to 130 square meters. The design includes auto-ignition and flame modulation. The combustion chamber is also closed here, which ensures the safety of the user.

Important! Modern boilers are equipped with a special function that turns off the installation at the time of an emergency emergency.

An expansion tank with a volume of 6 liters is built into the device, the weight of the boiler is relatively small - 28 kg. The chimney diameter is 100 mm, the unit is equipped with frost protection. The manufacturer claims that the buyer will be able to use hot water even at low gas pressure. In addition, in the event of power outages in the boiler, a special chip is triggered to ensure that there are no breakdowns in the future.

• Availability;
• Economical gas consumption;
• Quiet operation;
• The set includes a remote control panel.

• Small delays when turning on.

Maria, 38 years old

Last year, for the first time, they abandoned central heating and installed their own double-circuit boiler Navien. The device heats a square of 80 sq.m., while hot water flows without problems. I like that there is a remote control with which we can set programs for work.

On the sixth line of our rating, a gas wall-mounted boiler from Mora-Top settled. This is a convection model with a power of 23 kW, on the front panel of which the most necessary levers are located: adjusting the temperature of water and heating. There is also a small display showing the necessary information.

Hinged gas boiler Meteor Plus PK24KT is a convenient and practical solution for a private home. A closed chamber, flame modulation, the presence of a circulation pump - all this allows you to ensure safety during operation. The expansion tank has a volume of 6 liters, and the maximum performance at a water temperature of 35 degrees is 9.4 liters of water per minute. The boiler operates on single-phase mains voltage.

• Economical gas consumption;
• Electronic control on the display;
• Autodiagnostics;
• High level of efficiency - 90%.

• Big weight.

Maxim, 36 years old

I bought this model for one simple reason - because of the low gas consumption. The device works only with grounding, so it is safe to use. Ease of use also conquered - you set the temperature on the display, and everything functions. The boiler is easy to maintain - you unscrew a couple of bolts from the side, and the panels are removed.

The next in our top wall-mounted double-circuit gas boilers is a device from the company Oasis. The maximum heating power of this model is 18 kW. The design has auto-ignition, as well as a definite bonus - the ability to connect underfloor heating. This unit is able to heat an area up to 180 sq.m.

Advice! When installing a gas boiler, hot water intake points must be located in close proximity.

The Oasis convection boiler is electronically controlled and has a closed combustion chamber. The mains voltage must be single-phase. The temperature range during operation varies between 30-80 degrees.

• Attractive appearance;
• Frost protection;
• Fast and high-quality water heating.

• Lack of remote control.

Anna, 30 years old

My husband and I moved to a country house where there was no heating at all. We put this boiler and immediately appreciated its advantages. It heats a large area of ​​the room, and is also very easy to maintain. In the event of a problem, the husband himself opened the panel and fixed everything.

On the fourth place of the top of the best gas double-circuit wall-mounted boilers is a representative of the Lemax company - the best domestic heating and hot water supply device. It should not be in vain to assume that the Russian manufacturer offers low-quality products: Lemax is a combination of modern safety requirements with German and Italian developments.

High efficiency is achieved through a closed combustion chamber and a coaxial chimney with a turbine. According to the review of this device, it is equipped with two independent circuits based on brass coils. The power range is 11-32 kW, which makes the model productive. The boiler is compatible with a large number of modern thermostats and control systems, which is beneficial for maintenance.

• High thermal conductivity;
• Strength;
• Corrosion resistance;
• Compactness;
• Large heating area - up to 300 sq.m.

• High cost compared to similar models.

Eugene, 45 years old

I installed this particular Russian-made boiler, because, according to reviews, it is the best in its segment. It suits me that all the necessary information is displayed on the display, and even a pensioner can master simple controls - this is how I taught my dad to use the device when we are not at home.

Opens the top three wall-mounted gas boilers for heating a private house manufacturer Baxi. This boiler is a combination of Italian quality and maximum efficiency at a reasonable cost. A distinctive feature of the device is a removable digital panel, which is also a temperature sensor in the room. This feature allows the owner of the boiler to decide where the control panel will be located.

In terms of reliability, this unit exceeds all expectations: a 60-liter boiler, LCD display, stainless steel dividers, as well as smooth electronic ignition. The unit can be reconfigured to work with liquefied gas, which is also convenient for different living conditions.

• Brass hydrogroup;
• Rich functionality;
• Possibility of programming;
• Button control;
• Premium boiler.

• High price

Vladimir, 49 years old

Despite the high price of this device, I still decided not to save on safety and quality. The boiler has been heating my house for the third year now, it works very quietly, and also turns off in case of emergency. The boiler allows you to set the exact temperature, which is very convenient when a large family lives in the house.

Numerous reviews of gas boilers allowed us to place a model from the Ariston brand on the second line. Stylish appearance - the white body is combined with a silver electronic type control panel. Buyers are also attracted by the affordable price and basic features without unnecessary bells and whistles. This device is suitable for work in rooms up to 220 sq.m.

Home heating systems using gas boilers as a heat source are becoming common and widespread.

Often, homeowners refuse the services of centralized networks in favor of autonomous systems.

They prefer to independently regulate the heating mode and the timing of the start or end of the heating season.

The set of functions of modern gas boilers is much wider than before, new features and additions have appeared.

Consider a group of double-circuit boilers, the most popular gas units.

Double-circuit boilers have two basic functions:

• House heating.
• Hot water supply for domestic needs.

All other features are considered additional, contributing to a more successful and efficient implementation of the main tasks. A feature of this type of boilers is the need to work throughout the year.

Single-circuit structures are stopped for the summer, which allows you to increase the resource of components and parts. Double-circuit units have to be operated in a constant mode, turning off only the supply of coolant to the heating system.

This increases the load on the parts and components of the unit, reduces the resource of the most loaded sections of the boiler.

As a rule, for such designs, the power level is limited to 40-50 kW; more productive units are already equipped with built-in storage or external boilers.

In terms of design, dual-circuit models are the basic version with an added secondary heat exchanger. However, there are other types of boilers that can demonstrate more stable and high performance.

These include:

• Designs with a combined heat exchanger. They provide more stable DHW heating, high performance and fast response to requests.
• condensation models. These are boilers with the function of preheating the coolant using thermal energy from the condensation of water vapor from flue gases. Manufacturers claim for them an efficiency equal to 107-109%, which from the point of view of physics is completely absurd. At the same time, condensing units are able to work only with low-temperature systems. Under normal conditions, they lose additional features and function as convection structures.

NOTE!

When choosing a boiler, you should make sure that its design can fully work in the proposed conditions. Otherwise, expensive equipment will be used only partially, which is unacceptable.

Kinds

Double-circuit gas boilers are distinguished according to certain characteristics.

According to the installation method:

• wall. Hanging mounting requires strong load-bearing walls. The dimensions and weight of such units are limited by the conditions of the permissible load.
• floor standing. They can be installed directly on the floor, which expands the capabilities of the boilers and allows them to be equipped with massive units of increased power and productivity.

Type of heat transfer:

• Convection. The heat carrier is heated by a gas burner.
• Condensation. A two-stage heating scheme is used, where the first stage is the return flow heating in the condensation chamber, and the second stage is the usual preparation process in the primary heat exchanger. For the proper course of the process, it is necessary to provide appropriate conditions, which is possible only in the southern regions.

Type of heat exchanger:

• Separated. The heat carrier is heated by the primary unit, and the secondary heat exchanger (usually plate type) is responsible for the preparation of hot water.
• Combined (bithermic). It is a coil from a pipe of a specific section, where two streams can flow simultaneously without mixing. Allows you to increase the productivity of hot water, but is difficult to clean from lime deposits.

Type of combustion chamber:

• Atmospheric (open). The traditional way of operating the boiler, where the smoke is removed naturally through a standard chimney, and the air is taken directly from the room.
• Turbocharged (closed). Air is taken from the outside using a coaxial chimney (pipe-in-pipe design). The supply of fresh air is provided by the turbo blower. It also displaces flue gases, providing a stable and adjustable smoke removal mode.

Turbocharged models are much more efficient and stable in operation, they are optimally suited for residential use.

What parameters should I pay attention to when buying

When choosing a suitable model of a gas double-circuit boiler, you should pay attention to the main technical parameters of the units:

Combustion chamber type

The most popular are boilers with a closed combustion chamber. The entire process of fuel combustion and smoke removal takes place in a system isolated from the atmosphere of the room, which increases safety for people.

In addition, a controlled smoke extraction process is much more efficient than unstable natural draft.

Power

The power level of the boiler is the main indicator that demonstrates the ability of the unit to provide thermal energy to rooms of different sizes.

Usually, the desired model is selected at the rate of 1 kW of power per 10 m2 of area.

It should be noted that a large margin should not be made, since the operating mode of the boiler should be close to the nominal one.

Heat exchanger material

For the manufacture of heat exchangers are used:

• stainless steel. This is the most affordable option, which is used in boilers of the medium and budget price range. The heat transfer and service life of such units are quite high, there is a possibility of repair or restoration.
• Copper. Heat exchangers of this type are installed in the most expensive and productive series of gas boilers. The indicators of copper heat exchangers are considered the highest.
• Cast iron. As a rule, it is used in powerful outdoor units. The heating mode is stabilized due to the large thermal inertia of the material.

Boiler type

There are two types:

• convection. The usual design of the gas unit.
• Condensing. In addition to the traditional method, these models are equipped with a coolant preheating function, which reduces fuel consumption and the load on the heat exchanger.

When choosing the type of boiler, it must be taken into account that the operation of condensing devices is possible only if the difference between the external and internal temperatures is not more than 21 °, which in Russia is impossible to ensure due to climatic conditions.

Energy independence

There are volatile and independent installations. The first ones have the maximum set of functions, but in case of a sudden power outage they become useless.

The latter do not use electricity, which expands the geography of their use. At the same time, non-volatile models have minimal capabilities and a complex ignition method.

TOP-10 rating

Consider the most popular models of double-circuit gas boilers, recognized by experts and ordinary users as the most successful in terms of design and operation:

Buderus Logamax U072-24K

Gas double-circuit boiler designed for wall mounting. Equipped with a closed-type combustion chamber and a separate heat exchanger - primary copper, secondary - stainless.

Heating area - 200-240 m2. It has several levels of protection.

Models with the index "K" perform heating of hot water in flow mode. It is possible to connect a room temperature controller.

Federica Bugatti 24 Turbo

Representative of Italian heat engineering, wall-mounted double-circuit gas boiler. Designed to work in a cottage or public space up to 240 m2.

Separate heat exchanger - copper primary and steel secondary. The manufacturer gives a 5-year warranty period, which indicates confidence in the quality and operational capabilities of the boiler.

Bosch Gaz 6000 W WBN 6000-24 C

The German company Bosch is known all over the world, so it does not need additional introductions. The Gaz 6000 W series is represented by wall-mounted models designed for operation in private homes.

The 24 kW model is the most common, it is optimal for most residential and public buildings.

There is a multi-stage protection, the copper primary heat exchanger is designed for 15 years of service.

Leberg Flamme 24 ASD

Leberg boilers are usually referred to as budget models, although there is no noticeable difference in cost with products from other companies.

The Flamme 24 ASD model has a power of 20 kW, which is optimal for houses of 200 m2. A feature of this boiler is its high efficiency - 96.1%, which is noticeably superior to alternative options.

Works on natural gas, but can be reconfigured to liquefied gas (replacement of burner nozzles is required).

Lemax PRIME-V32

Wall-mounted double-circuit boiler, the power of which allows you to heat 300 m2 of area. It is suitable for two-story cottages, shops, public or office spaces.

Produced in Taganrog, the basic technological principles of assembly were developed by German engineers. The boiler is equipped with a copper heat exchanger providing high heat transfer.

It is calculated on operation in difficult technical conditions.

Navien DELUXE 24K

Korean boiler, the brainchild of the famous company Navien. It belongs to the budget group of equipment, although it demonstrates high performance.

It is equipped with all necessary functions, has a self-diagnosis system and frost protection. The power of the boiler is designed to work in houses up to 240 m2 with a ceiling height of up to 2.7 m.

Mounting method - wall-mounted, there is a separate stainless steel heat exchanger.

MORA-TOP Meteor PK24KT

Czech double-circuit gas boiler, designed for hanging installation. Designed for heating 220 m2. It has several degrees of protection, blocking in the absence of liquid movement.

It is possible in addition to connect an external water heater, which greatly expands the possibilities of supplying hot water.

Adapted to unstable power supply voltage (permissible fluctuation range is 155-250 V).

Lemax PRIME-V20

Another representative of domestic heat engineering. Wall-mounted double-circuit gas boiler, designed to service 200 m2.

The modulating burner makes it possible to distribute fuel more economically by changing the gas combustion mode depending on the intensity of the coolant circulation. Has a separate stainless steel heat exchanger, can be connected to a room thermostat.

Possibility of remote control.

Kentatsu Nobby Smart 24–2CS

Japanese wall mounted gas boiler providing heating of 240 m2 and hot water supply. Model 2CS is equipped with a separate heat exchanger (primary in copper, secondary in stainless steel).

The main type of fuel is natural gas, but when changing jets, it can be converted to the use of liquefied gas. Most of the performance characteristics correspond to European boilers of similar power and functionality.

It is possible to use several design options for the chimney.

Oasis RT-20

Wall-mounted double-circuit gas boiler of Russian production. Designed to work in rooms of about 200 m2. Equipped with an efficient copper heat exchanger and a stainless secondary assembly.

The combustion chamber is of a turbocharged type, there is a built-in expansion tank and a condensate drain.

With an optimal set of functions and high build quality, the model has a relatively low price, which ensures its demand and popularity.

Reviews

The opinion of users is rarely unanimous, but its value lies in disinterest and the most realistic assessment of the situation.

Here's what their owners think about choosing dual-circuit units:

(( reviewsOverall )) / 5 Owner rating (4 votes)

Your opinion

Most buyers are trying to purchase an economical floor-standing gas boiler for their home, since gas is not cheap today. But, in addition to fuel consumption, there are many criteria by which the unit is considered economical. This is the service life, and the operation of the weather-dependent system, and the efficiency of the unit.

The efficiency of a gas unit directly depends on its service life. Boilers with cast-iron heat exchangers are able to work the longest - their service life is 30-40 years. However, they can "live" for so long only with careful handling. Cast iron is brittle and must be handled with extreme care. It is also necessary to avoid getting cool water on the surface of the hot heat exchanger, as the temperature difference will lead to cracks.

Floor-standing units with steel contours are not as capricious as cast-iron ones, but they are much more susceptible to corrosion. Because of this, steel elements fail faster.

Also, the operational period depends on the availability of spare parts for sale and the quality of the heating equipment. Therefore, when buying a unit of a certain brand, you should ask if it is easy to find accessories for it. As for the manufacturer, German and Slovak units work the longest. Domestic analogues fail faster, but they are better adapted to difficult Russian operating conditions and will cost less.

Note! Many manufacturers recommend installing a voltage stabilizer for their gas boiler. This is a condition for continued warranty service.

Some owners of floor gas boilers try to save on maintenance and do not call a specialist for scheduled repairs. However, during operation, the focus of the burner may shift, soot may appear and other minor malfunctions may occur. If they are not eliminated in time, then fuel consumption will increase, and the performance of the unit will decrease. Therefore, it is better not to save on service.

How does automation make a gas boiler more economical?

The efficiency of a gas unit is also affected by the ability to reduce and increase productivity during operation. Modern weather-dependent systems are able to reduce the intensity of combustion depending on the temperature outside or in the room. This significantly reduces gas consumption and, accordingly, the cost of it.

Some modern automation systems can be set to work for a day or a week. You can set the operation of the gas unit so that at night the temperature in the room is lower.

There are floor gas boilers with these types of burners:

• single-stage - has one power level;
• two-stage - two power levels;
• modulating - several power levels.

The last type of burner is considered the most economical, as it has the ability to smoothly switch to different power levels.

Efficiency of outdoor gas units

The main indicator when choosing an economical gas boiler for organizing home heating is the coefficient of performance - efficiency. Its value for outdoor gas units lies in the range of 84-99%. Low-cost devices equipped with a one- or two-stage burner have a low rate. Boilers work more efficiently, in which the power can change smoothly, depending on weather conditions.

The heat that is obtained as a result of gas combustion heats the heat exchanger with the heat carrier. After that, the remaining heat passes into the chimney and irrevocably goes into the atmosphere. The amount of heat lost is shown by the flue gas temperature. If the smoke is heated to 200°C or more at the outlet of the nozzle, then this unit is not considered economical. The best option is flue gas temperature in the range of 100-150 °C.

Condensing gas boilers

The condensing unit is considered the most economical floor gas boiler for the home. This is possible thanks to a special technology for extracting heat from the resulting moisture. To do this, a floor-standing gas boiler is equipped with a cylindrical burner, which is located inside a stainless steel heat exchanger. It is made in the form of a coil with tightly packed coils. Water vapor condenses on the heat exchanger, the heat from which also heats the coolant. Due to this, thermal energy is maximally spent on heating the heat exchanger. The efficiency of such units is 97-99%.

Note! If, due to problems with electricity, you decide to purchase a non-volatile gas boiler, then keep in mind that it will not be economical. For such boilers, the efficiency rarely exceeds 91%.

The cost of floor gas boilers

Another important selection criterion is the price of the device. Condensing models are much more expensive than convection ones. It is better to purchase a boiler that can work on both natural and liquefied fuels.

Basically, devices of an affordable price category include models with low efficiency. More efficient units, especially foreign-made ones, are more expensive.

If you cannot afford condensing-type heating devices, you can purchase a cheap domestic boiler with low fuel consumption.

Today's market for heating equipment will satisfy the needs of any buyer, and offers are no exception. Here you can find many models of both budget units and expensive top-end equipment. In conditions of such saturation, it is difficult to determine which gas boiler is the most reliable, especially if you have not had to buy these devices before.

Statistics on the sale of these units by dealers and an analysis of the popularity among consumers of various models of gas heating boilers make it possible to form and publish such a dynamic factor as the rating of this equipment, which will help an inexperienced buyer.

Appearance of modern gas-fired boilers of various designs

Why choose a gas boiler?

The installation of heating equipment that consumes gas as a fuel has a number of advantages and even advantages over using units on other types of fuel:

• high equipment efficiency;
• a wide range of prices for gas boilers;
• no need to create fuel reserves;
• affordability of the price of this natural energy carrier;
• high degree of automation .

By purchasing such an installation, the buyer, of course, counts on the heat in the house, the safety of the boiler and the durability of this equipment.

Regardless of the model and manufacturer, the heating temperature of the coolant is approximately the same for all gas boilers. In addition, before being released to the market, the units undergo mandatory testing for compliance with safety standards, top-end models are equipped with self-diagnosis and multi-level protection systems.

After analyzing the service life, the need for repairs and feedback from experts, buyers, up to ten models of gas boilers can be distinguished, characterized by a high degree of efficiency, safety and ease of use.

Rating of wall-mounted gas boilers

Wolf CGG-1K-24

Double-circuit gas water heating unit manufactured in Germany Wolf CGG-1K-24 wall-mounted

Wolf CGG-1K-24 (made in Germany) - the most reliable wall-mounted double-circuit gas boilers with a closed combustion chamber with forced smoke removal.

Important! Carbon dioxide is removed and oxygen is supplied through separate or concentric chimneys (air ducts) - a special sensor independently regulates the fan speed depending on the length of the pipe for removing combustion products.

Advantages:

• high quality and efficiency;
• rationality of placement - the possibility of mounting close to the wall;
• the possibility of using main or liquefied gas (after replacing the nozzles and making changes to the settings);
• fast heating of water;
• soft start;
• compact dimensions;
• light weight (weight up to 45 kg);
• reliability;
• long warranty (24 months).

Flaws:

• high cost (52-55 thousand rubles).

Baxi Luna-3 Comfort 240 Fi

Double-circuit gas boiler Baxi Luna-3 Comfort 240 Fi wall placement

The wall-mounted double-circuit gas boiler from Baxi is perfectly adapted to the specifics of work in the CIS countries. It works even with minimal gas supply. The equipment has a removable digital panel, which allows you to install it in any convenient place. It also acts as a temperature sensor in the room. Works on fuel from the highway or a cylinder. A filter is provided for the water supply. The equipment possesses high quality of execution and excellent functionality.
Advantages:

• stable operation at low gas pressure;
• closed combustion chamber;
• special anti-corrosion coating of copper components of the heat exchanger;
• the ability to connect an additional boiler for a hot water supply system;
• two heating modes (normal and underfloor heating);
• timer with programming for a week;
• it is possible to connect an outdoor temperature sensor;
• digital monitor, which indicates all the necessary information;
• electronic self-diagnosis.

Flaws:

• high cost (45-47 thousand rubles);
• sensitivity of electronics to power surges - it is necessary to connect through a stabilizer.

Bosch Gas 6000W WBH 6000-24C

From a well-known German company, it was created adapted to the climatic conditions of the Russian regions, as well as to the peculiarities of domestic electrical and gas networks.

Double-circuit heating boiler Bosch Gaz 6000 W WBH 6000-24C (Germany) wall-mounted

Advantages:

• compactness;
• modern design;
• high efficiency;
• stability of work at constantly changing gas pressure;
• the ability to connect to a cylinder or line (after changing the nozzles of the burners and adjusting);
• modern chimney system;
• high security;
• ideal price / quality ratio;
• high quality assembly.

Flaws:

• rather high cost (27 - 33 thousand rubles)
• small thickness of steel body parts.

Navien Deluxe 24K

Double-circuit boiler with closed type combustion chamber, unit of high functionality. It has a closed combustion chamber. Adapted to working conditions in the post-Soviet space.

Double-circuit gas boiler of increased functionality Navien Deluxe 24K

Peculiarities:

1. Built-in frost protection - if the temperature of the liquid in the heating system drops to 10 degrees, the pump automatically turns on; with further cooling to 6, the burner starts until the water reaches 21ºС.
2. Stable operation at low pressure in the gas and water pipes - the system operates at the respective rates of 4 bar and 0.3 bar.
3. Control panel provided.

Advantages:

• separate stainless steel heat exchangers;
• modulated boost, which increases efficiency;
• quality copper internal components;
• affordable price;
• high quality assembly;
• wide functionality.

Flaws:

• fluctuating outlet water temperature.

Protherm Cheetah 23 MOV

These devices are perfect for installation in apartments and country houses. They are double-circuit boilers, which allows you to heat water and simultaneously heat the room. Efficiency - up to 93%.
Advantages:

• ease of management;
• a monitor showing all the necessary information about the operation of the device;
• automatic diagnostics;
• several modes - underfloor heating, comfort and winter / summer;
• the option of connecting automation that monitors the weather is provided;
• built-in pump;
• protection against freezing and overheating;
• works from the gas pipeline or a cylinder.

Wall-mounted gas heating boiler Protherm Cheetah 23 MOV

Flaws:

• it is imperative to install a separate filter on the incoming water in order to protect the boiler system from salts;
• the possibility of installation only if there is a chimney in the housing.

Rating of wall mounted condensing gas boilers

Vaillant ecoTec plus VUW INT IV 246

Wall-mounted gas boiler manufactured in Germany Vaillant ecoTec plus VUW INT IV 246

German gas boiler. The thermal power of the unit is 20 kW, which allows it to be used for heating housing up to 200 square meters. m, the device is designed for stable heating of water and heating. To increase the water temperature in the pipeline, a latent condensation system is additionally switched on, due to which it is possible to achieve the declared performance with significantly lower fuel consumption.

Peculiarities:

1. Built-in power boost function in DHW mode.
2. It is also used for low-temperature heating systems.
3. External and internal oxygen supply to sustain combustion.
4. Backlit display.
5. Electronic ignition.
6. Stainless steel heat exchanger.
7. Built-in pump.
8. Expansion tank for 10 liters.

Advantages:

• modern design;
• high quality;
• economy.

Flaws:

• connects to a common network only through a voltage stabilizer;
• high cost (75-77 thousand rubles).

Baxi Duo-tec Compact 24

Inexpensive boiler, made in Italy, with a closed combustion chamber and stainless steel heat exchangers. The model has a simple and convenient control. Installation of the unit is not technically complicated.

Important! The device has a system for adapting to different operating conditions. Even with a drop in gas pressure, the rated power is maintained.

Gas heating boiler made in Italy Baxi Duo-tec Compact 24 with LCD display

Advantages:

• light weight;
• compactness;
• high efficiency;
• low noise and vibration levels;
• profitability;
• quality components and solid build.

Flaws:

• dependence on the parameters of electricity in the network;
• rather high cost (45-53 thousand rubles).

Rating of floor single-circuit gas boilers

Viessmann Vitogas 100-F GS1D870

Gas single-circuit boiler Viessmann Vitogas 100-F GS1D870 floor version

This model is a single-circuit gas boiler with an open combustion chamber. Its thermal power is more than 27 kW. Due to the small dimensions, there are no problems in installation - it can be located even in a small room. The products of this manufacturer are always of high quality.
Advantages:

• high efficiency;
• heat exchangers are made of gray cast iron;
• weather-dependent automation;
• intermittent ignition system;
• silent start;
• compact dimensions;
• modern design;
• economical work.

Flaws;

• high cost (141-143 thousand rubles).

Prothrem Bear 30 KLOM

The equipment is a single-circuit boiler, which is manufactured in Slovakia. It has an open combustion chamber. Heat exchangers are made of high quality cast iron. Perfectly is suitable for heating of houses, premises of production appointment and country constructions.

Single-circuit gas boiler floor placement Protherm Bear 30 KLOM

Advantages:

• electric ignition;
• atmospheric burner made of stainless alloys;
• smooth power adjustment;
• informative monitor;
• protection of components from condensate;
• cooling circuit;
• winter / summer mode is provided;
• compact dimensions;
• simple installation;
• reliable assembly.

Flaws:

• open type combustion chamber;
• rather high price (45-55 thousand rubles);
• the need for a chimney.

What kind of boilers to use? On the market of thermal equipment today there are many models of units from various manufacturers, which have different modifications. But from this set, it is necessary to choose devices that have an optimal price / quality ratio, taking into account the required power and functionality.

The choice of a boiler for a heating system is an important and responsible procedure that determines the microclimate at home for the coming years.

Mistakes in such a case are unacceptable, but most users do not have sufficient knowledge on this topic.

It is necessary to clearly enough imagine the design features of gas boilers, to be able to determine the most successful parameters and a set of functions.

Sales assistants often try to sell stock and give misleading information, so it's helpful to have some margin of knowledge about the most important aspects.

Consider one of the most efficient and popular groups of heating gas boilers - floor models

The basic function of any boiler is heating the coolant (RH) for the heating circuit. All models have it, regardless of what additional features they have..

There are units designed only for the preparation of the coolant. These are single-circuit boilers that perform a single, main task. In addition, there are double-circuit boilers capable of preparing hot water for domestic needs simultaneously with the heating of the OB.

They are equipped with an additional heat exchanger, which uses part of the excess heat energy of the coolant.

These units are called double-circuit. They allow you to get the maximum set of functions, but have some performance limitations on the DHW circuit.

Heating occurs in flow mode, so it is not yet possible to achieve a uniform and stable temperature.

NOTE!

Single-circuit boilers can be connected to external storage boilers. This will require some expenses, but as a result it makes it possible to obtain a stable and even DHW.

Pros and cons

The advantages of floor boilers include:

• no restrictions on the power of the unit;
• strength, reliability of all components and parts;
• ease of installation;
• stability of work, the ability to maintain a given mode regardless of external conditions;
• lack of unnecessary additions;
• powerful models can be connected in a cascade of up to 4 units, forming high-performance thermal units.

The disadvantages of floor structures are considered:

• large weight, size;
• the need for a separate room;
• for atmospheric models, connection to a common house chimney is required

In addition to a separate room, for floor-standing boilers, it is necessary to ensure the possibility of connecting to a vertical chimney or leading a horizontal pipe through the wall.

Convection or condensation?

The traditional way of heat transfer of a gas boiler is to heat the coolant in flow mode. It passes through the heat exchanger, and the gas burner heats the liquid according to the specified operating mode.

This type of boiler is called convection. Relatively recently, a new design of units has appeared - condensing. It uses preheating of the coolant from the heat released during the condensation of the exhausted smoke.

The temperature of the liquid rises by a small amount, but this is enough to make it possible to reduce the heating mode of the main heat exchanger.

The result is a positive effect:

• fuel consumption is reduced;
• increases the service life of the boiler.

With properly organized operation of the unit, fuel savings reach 20%. However, there are some specific conditions that sharply limit the scope of condensing boilers.

The reason is that the condensation process can only take place when the temperature of the walls of the condensation chamber is higher than the return flow temperature. This is only possible on underfloor heating systems or radiator circuits with a low heat output.

It is estimated that the operation of the first stage is possible only if the difference between the outside and inside of the house is no more than 20 °. For Russia, such a ratio is simply unrealistic. If condensation is not possible, the boiler operates as a conventional convection model.

Given the almost twofold difference in prices, the expediency of such an expensive purchase with dubious effectiveness should be weighed.

What is the difference between non-volatile and conventional boilers?

Conventional (volatile) boilers need a power supply, without which they cannot work. The turbofan, circulation pump, electronic control board need a high-quality and stable power supply.

Particularly capricious are the control boards, which immediately fail when the current parameters change. Manufacturers claim the ability to withstand strong voltage fluctuations, but in practice this is not observed.

At the same time, volatile units have a set of additional features - they can be controlled remotely, integrated into a smart home system, and programmed for some time in advance.

Non-volatile boilers do not have all these additions. They work exclusively with the help of mechanical components and parts, like a conventional gas stove.

The design of such units is devoid of all unnecessary components, it is functional and therefore very reliable. In addition, owners of non-volatile boilers are not threatened with a sudden power outage without heating.

Dilapidated and congested networks are typical for remote villages, so the use of independent heating systems is very valuable for many users.

Types of heat exchanger materials - what to choose?

The heat exchanger is the main unit of the gas boiler. The coolant is heated in it, so the parameters and design of this unit are of great importance.

Used for manufacturing:

• stainless steel. This is a budget option, although the parameters of steel heat exchangers allow you to get quite effective results. Typically, such nodes are installed on inexpensive medium-sized boilers;
• copper tube (coil). This option is used on expensive models of gas boilers. Copper has a high heat transfer coefficient, so the effect of using such heat exchangers is very high;
• cast iron. It is resistant to mechanical and thermal loads. For the manufacture of heat exchangers, gray ductile metal is used, which is resistant to drops or different liquid temperatures at individual points. Massive knots help to even out the degree of heating and soften sudden temperature changes.

Copper heat exchangers are considered the most preferable, but steel and cast iron assemblies are quite efficient and can provide high-quality heating of the OB.

Types of boilers by type of smoke removal and which one is better?

There are two options for the output of combustion products:

• atmospheric. This is the traditional way to remove flue gases using natural furnace draft. The technique is well studied, but it is characterized by instability and strong dependence on external conditions. Most often used on non-volatile models;
• with a turbofan. The combustion chamber of such boilers is isolated from the outside atmosphere, so the combustion process and the removal of smoke are provided by a turbocharging fan. It supplies fresh air that supports the flame and displaces smoke into a specially designed chimney (coaxial).

Turbocharged boilers are considered more convenient designs for residential use - there is no smell of smoke, oxygen does not burn out, the unit is completely safe.

However, such boilers need to be connected to the power supply network.

The choice of coolant

Usually two options are used:

• water. Experts recommend pouring distilled water if the volume of the system allows it. This method avoids the formation of lime deposits, but it will not protect against freezing pipes in winter;
• ethylene glycol (antifreeze). It is a liquid that does not freeze when circulation stops. Contains a set of anti-corrosion additives, does not form scale, does not have a destructive effect on polymers, rubber, plastic.

For systems that need to be drained frequently, water is the best and most economical choice. The use of antifreeze is recommended for heating circuits operating in difficult conditions.

Types of boiler ignition methods and which method is the most optimal?

There are three ignition options:

• electronic. The burner is ignited at the touch of a button using a special unit. This option is present on all models of volatile boilers;
• piezoelectric. The principle of operation of such a system is similar to all piezo devices - for a spark to appear, you need to press on a special crystal. Used on non-volatile boilers. Many users find this type of ignition inconvenient;
• manual. The flame is ignited with an ordinary lit match (torch). For ignition, it is necessary to have some supply of such elongated wooden sticks.

Most users unanimously prefer the electronic type of ignition, but it is not possible on non-volatile units. You have to get used to using a piezoelectric element or setting fire to the burner with a burning torch.

Types by type of combustion chamber

There are two types of combustion chambers:

• atmospheric (open). They work on the traditional principle - air is taken directly from the surrounding atmosphere, and smoke is removed using natural draft. For the operation of such boilers, appropriate conditions are needed, so they are not in great demand. However, atmospheric units are capable of operating in a non-volatile mode;
• turbocharged (closed). The fully sealed design requires an air supply, which is done by a turbofan. This method allows you to control the mode of combustion and the output of combustion products. It is considered the most convenient and safe.

The choice of the combustion chamber is determined by the design of the boiler - all non-volatile models are atmospheric, and dependent units can be both open and closed.

Turbocharged vehicles are preferred.

Rating TOP-10 floor gas boilers

Consider the features of some of the most popular models of floor gas boilers:

Protherm Wolf 16 KSO

The company from Slovakia produces a wide range of gas boilers. The Wolf 16 KSO model is a single-circuit copper with a power of 16 kW. He is successfully able to heat a house of 160 square meters. m.

The heat exchanger of a copper two-pass, is made of stainless steel.

main parameters:

• Efficiency - 92%;
• coolant temperature - 30-80 °;
• gas consumption - 2.1 m3/hour;
• dimensions - 390x745x460 mm;
• weight - 46.5 kg.

All series of Protherm boilers are named after various animals. By their appearance, you can determine whether a given model belongs to a certain group of equipment.

Lemax Premium-12.5

Floor single-circuit gas boiler of Russian production. With a power of 12.5 kW, it is able to heat rooms up to 125 square meters. m.

Main characteristics:

• Efficiency - 90%;
• gas consumption - 1.5 m3/hour;
• dimensions - 416x744x491 mm;
• weight - 55 kg.

Non-volatile units allow you to increase the reliability of work and remove concerns about the safety of heating in the winter.

Lemax Premium-20

Russian heating floor boiler. The power of the unit is 20 kW, being a good choice for owners of houses up to 200 sq.m.

A non-volatile boiler with a steel heat exchanger has the following parameters:

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 3 bar;
• gas consumption - 2.4 m3/hour;
• dimensions - 556x961x470 mm;
• weight - 78 kg.

Single-circuit non-volatile models have the simplest design, which increases the reliability and stability of their work.

BAXI SLIM 1.230 iN

Italian engineers have developed a high-quality and productive model of a floor gas boiler with a capacity of 22.1 kW. This allows the unit to heat an area up to 220 sq. m.

• Efficiency - 90.2%;
• coolant temperature - up to 85 °;
• pressure in the system - up to 3 bar;
• gas consumption - 2.59 m3/hour;
• dimensions - 350x850x600 mm;
• weight - 103 kg.

BAXI boilers belong to the group of elite heating equipment and are one of the leaders in European heat engineering.

Lemax Premium-25N

Another representative of domestic heating equipment manufactured in Taganrog. This is a single-circuit non-volatile gas boiler designed for floor mounting.

Its parameters are:

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 3 bar;
• gas consumption - 3 m3/hour;
• dimensions - 470x961x556 mm;
• weight - 83 kg.

The warranty for Lemax boilers lasts 36 months, which increases the technical support of the manufacturer by one and a half times and allows the user to receive specialized repair or maintenance of the units.

Siberia 11

Products of the Rostov company "Rostovgazoapparat". The power of this floor-standing non-volatile unit is up to 11.6 kW, allowing you to heat the house up to 120 square meters. m.

All control is mechanical, a power outage will not affect the heating system in any way.

Boiler parameters:

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 3 bar;
• gas consumption - 1.18 m3/hour;
• dimensions - 280x850x560 mm;
• weight - 52 kg.

The company's arsenal includes single and double-circuit models of boilers of this series.

MORA-TOP SA 20

Czech floor-standing boilers with a cast-iron heat exchanger provide high reliability and stability of home heating. The MORA-TOP SA 20 model has a power of 15 kW and is designed to work in rooms up to 150 square meters. m.

Boiler characteristics:

• Efficiency - 92%;
• coolant temperature - 85 °;
• pressure in the system - up to 3 bar;
• gas consumption - 1.6 m3/hour;
• dimensions - 365x845x525 mm;
• weight - 99 kg.

The design of the heat exchanger is sectional, consists of 3 compartments. The boiler is non-volatile, but is equipped with two types of nozzles - for natural and forced circulation.

Lemax Premium-10

Floor-standing non-volatile gas boiler with a capacity of 10 kW. Able to heat a house up to 100 sq.m.

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 1 bar;
• gas consumption - 1.2 m3/hour;
• dimensions - 330x748x499 mm;
• weight - 48 kg.

The boiler is single-circuit, all controls work on a mechanical principle.

Lemax Premium-16

Floor-standing gas boiler, designed to service the heating system of a private house up to 160 sq. m.

Its power is 16 kW, other parameters:

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 3 bar;
• gas consumption - 1.9 m3/hour;
• dimensions - 416x744x491 mm;
• weight - 55 kg.

This model is one of the most popular on the market, since its power is optimal for most private houses.

Lemax Clever 30

Single-circuit floor gas boiler. Its power is 30 kW, which allows you to heat 300 square meters. m. usable area. The unit is volatile, has electronic control and a comprehensive protection system.

Characteristics:

• Efficiency - 90%;
• coolant temperature - 90 °;
• pressure in the system - up to 2 bar;
• gas consumption - 1.75 m3/hour;
• dimensions - 470x961x556 mm;
• weight - 85 kg.

The power of the unit is excessive for one residential building, therefore, owners often purchase such boilers in a pool and use them to work in 2 systems.

Customer Reviews

Consider user opinions:

(( reviewsOverall )) / 5 Owner rating (3 votes)

Your opinion