Which 2-circuit wall-mounted gas boiler is better. Gas boilers. Double-circuit or single-circuit boilers

Currently, popular and popular wall-mounted gas boilers are used for high-quality space heating. This is explained by the fact that gas is the most accessible and at the same time inexpensive fuel. Markets and supermarkets offer a large number of different models of gas boilers, which differ in technical specifications and prices. Therefore, choosing the right option is quite difficult. To solve this problem, you should first study the specifications of the best equipment manufactured by various manufacturers and compare prices.

Wall-mounted gas boilers for heating - types

With the development of gas supply, space heating has increasingly been carried out with the help of modern equipment in the form of gas boilers. You can install this type of heating on the walls of private houses, apartments, cottages, industrial facilities.

Wall-mounted gas heating boilers have appeared on the Russian market relatively recently, but have already become a fairly sought-after product. There is nothing surprising in this, since they have a number of significant advantages:

Wall-mounted heating boilers have different capacities and in this they are in no way inferior to outdoor gas equipment. At the same time, the price of wall-mounted devices is slightly lower.

However, modern condensing gas structures. But these models have up to 99% efficiency, so when using them, fuel is saved significantly. In the manufacture of such boilers, modern automation and new metal alloys are used. They have a low exhaust temperature, so they are practically fireproof.

All wall-mounted gas equipment according to the type of chambers is divided into two types:

open heating devices in which air draft occurs naturally. In them, combustion products are thrown out through the chimney. Combustion air is taken from the room.

Closed structures are equipped with a forced air ventilation system. For their work, they take air from outside the room, and exhaust gases are thrown out into the street. Such models do not need an additional smoke exhaust system. In addition, they are small in size and weight.

Those who want to purchase a heating gas boiler will need to calculate the required power of the equipment. For every 10 sq. m. of premises with a ceiling height of not more than three meters, one kilowatt of device power will be needed. If the power of the boiler is not very large, then you can stop your choice on wall-mounted equipment. In addition, double-circuit wall structures can also provide hot water supply, as well as create additional heating circuits in the form of a “warm floor”.

Tips for choosing a wall-mounted gas boiler for heating

When choosing wall-mounted gas equipment for heating, you need to pay attention to some characteristics:

When choosing wall-mounted gas equipment, do not forget that such boilers sensitive to water quality and the duration of their work is still less than that of floor models.

The main suppliers of this equipment are foreign manufacturers:

To figure out which of the units is better and which one is suitable for certain needs, you should familiarize yourself with their characteristics.

Equipment from Italian manufacturers

Models of Italian manufacturing companies are very popular. This is explained by the fact that with a high level of quality they have a democratic cost.

Among the advantages of boilers from this Italian company are:

the presence of filters for pre-cleaning;
equipment with an outdoor sensor with a programming timer;
ability to adapt to low water pressure.

The most popular are:

Ariston BS II- gas boiler class "economy" is designed for those who understand the savings. It has a power of 15 kW, a unique hydraulic group and two separate reliable heat exchangers. The equipment is lightweight and compact in size. Price for Ariston BS II about 45 thousand rubles.

Ariston GENUS- wall-mounted gas equipment with a power of 24, 28 or 35 kW is the pinnacle of engineering. The devices are aimed at obtaining maximum comfort with significant savings. They are equipped with two heat exchangers designed for hot water and heating . Price depends on the power and can be from 82 to 94 thousand rubles.

Products from Baxi are wall-mounted boilers of small and medium power, manufactured using the most advanced technologies.

On the market, the equipment of this company is represented by various models, including:

Ferroli.

Equipment from this Italian manufacturer is suitable for rooms in which a chimney is not installed. The boilers are equipped with a built-in fan that removes exhaust gases.

The product has a rounded design, pierrot or electronic ignition, copper biothermal heat exchanger. Some models are equipped with a digital control system.

With the help of equipment from Ferroli, you can heat water and perfectly heat the room. The most minimal price for the product - 20 thousand rubles.

The best German gas boilers

High-quality and reliable products from German manufacturers are characterized by ease of operation and maintenance.

Gas boilers from this manufacturer use the energy that is released during the combustion of fuel to heat water. The structures are compact and light in weight, so they can be installed in a small room.

Among the products offered are:

Bosch ZWA 24-2 K 7716010216- a boiler with a power of 24.4 kW and an open combustion chamber. It serves for heating water and space heating. The design is equipped with a biothermal heat exchanger (pipe in pipe) and has small dimensions. You can adjust the parameters of the boiler using the built-in external control panel. Price for a product from 35 thousand rubles.

Bosch ZWC 24-3 MFA 7716704320- the device with a power of 24 kW is equipped with various types of protection that ensure completely safe operation. The closed combustion chamber of the equipment allows you to use it in any room and not worry about the state of the air. The design can be reconfigured to operate on liquefied gas. Price about 60 thousand rubles for a boiler of this model.

Reliable and high-quality equipment from this company has received a large number of awards. In the wall modification, gas boilers from Wolf are presented with a closed combustion chamber. They can operate on both natural and liquefied gas.

The devices are equipped with modules for programming operating modes, a frost protection system, temperature sensors, and automatic ignition. All models are lightweight, durable, easy to operate and install, high efficiency. The price of products - from 36 thousand rubles.

Wall-mounted gas equipment from Protherm

The Czech company produces compact devices designed for installation in apartments and houses. They are of good quality and high reliability.

Distinctive features of the line:

All products of the company have economical fuel consumption and low prices (from 15 thousand rubles).

The best wall-mounted gas boilers for heating from Russian companies

Domestic manufacturers produce high-quality, multifunctional, undemanding products in operation and adapted to Russian conditions.

Producer "Neva Lux".

The company offers a wide range of equipment for heating not only small apartments and houses, but also large industrial premises.

Appliances can be equipped with an open or closed combustion chamber. Their compact dimensions make it possible to stir structures in small boiler rooms. The built-in security system provides peace of mind for its user.

The Neva Lux units operate on natural gas and have modern controls. The price of boilers from the Neva Lux company is 18 thousand rubles.

Company "Rostovgazoapparat".

Manufacturers of the company produce easy-to-use and reliable designs. Particularly noteworthy are the Siberian models, which can be single- or double-circuit and have different power ratings.

A distinctive feature of these devices is increased protection against moisture. In the production of single-circuit boilers, only a cast-iron heat exchanger is used. Therefore, Siberia units can be installed in wet rooms. The price for the products of this manufacturer is from 18 thousand rubles.

ZhMZ or Zhukovsky Machine-Building Plant.

The power of ZhMZ gas boilers can range from 11 to 68 kW. Therefore, they can be used not only in small, but also large rooms.

ZhMZ products are represented by three classes:

All boilers of this manufacturer have a rectangular or round shape.

Having studied the characteristics, features and prices of the most popular types of gas heating equipment, you can easily choose a wall-mounted gas boiler suitable for your home or apartment. You just need to remember to ask the seller if there is a guarantee for the goods being sold and where to contact in case of a possible breakdown.

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 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! The removal of carbon dioxide and the supply of oxygen is carried out 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:

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.
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.
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:

Built-in power boost function in DHW mode.
It is also used for low-temperature heating systems.
External and internal oxygen supply to sustain combustion.
Backlit display.
Electronic ignition.
Stainless steel heat exchanger.
Built-in pump.
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.

Since gas in Russia costs an order of magnitude lower than electricity, many owners of private houses are turning to the installation of gas boilers. However, economic parameters are far from the only advantage of this type of units over the others - they include high thermal power, optimal efficiency, minimal emissions, as well as the possibility of heating large areas (on average from 150 to 300 square meters).

Of course, like any other technique, gas boilers have disadvantages. These include strict coordination of the installation with the federal service of Gaztekhnadzor, equipping the house with a chimney to remove (a small amount) of combustion products, as well as the introduction of automation to detect gas leaks.

In our rating you will find 15 of the best and highest quality gas boilers, the purchase of which will provide you with heat and hot water for many years. Before that, we advise you to study some of the nuances of choosing a gas boiler for a house or apartment.

The right choice - double-circuit or single-circuit?

As you know, according to the number of circuits, gas boilers are usually divided into single-circuit and double-circuit ones. Which one is better? The correct choice depends on the main purpose of the device.

Single-circuit ones are designed exclusively for the operation of the main coolant (radiators, pipes, etc.), that is, they are bought to provide heating. Most often, such devices are placed in cottages and in places where there is no water supply. In this case, a boiler is purchased for a single-circuit boiler for heating water in an autonomous plumbing system.

Double-circuit boilers are 2 in 1 devices. They can both heat the house and provide hot water. The coolant and the boiler in such a device are assembled into one unit. If hot water is not consumed, the coolant circulates in the heating circuit. As soon as the user opens the hot water tap, the system switches the valves so that the coolant is directed to the second circuit. This is the most popular type of gas boilers, which are installed in most apartments and private houses.

Heated power

The more powerful the boiler, the higher its cost. In order not to overpay extra money and eliminate additional costs in the future (the more powerful the boiler, the more resources it consumes), it is important to calculate what kind of gas boiler you need. An approximate calculation is as follows: per 10 sq. m. of a well-insulated room (ceiling height up to 3 m) should account for 1 kW of boiler heat output. For a poorly insulated room, another 30–50% is added to the heat output.

For a country house of 50 sq. m. enough to purchase a gas boiler with a capacity of 7 - 12 kW. But for a house of 200 sq. m. You will already need a more powerful device: 23 - 25 kW. Most modern double-circuit gas boilers are produced with a thermal power of 24 kW.

When choosing the power of the boiler, there is another important detail. If you take a device that is too powerful for a small room (for example, a 24 kW boiler for a one-room apartment of 40 sq. M.), The boiler will quickly heat up the coolant and turn off. As soon as the water cools down, the boiler will start again. Constant switching on and off will happen very often, which will lead to accelerated wear and increased gas costs. In turn, a boiler with a lower power will ensure smooth combustion, and switching on and off will occur much less frequently.

Which company should be preferred?

The highest quality and most reliable gas boilers are manufactured by Italian, German and South Korean companies. Even taking into account the fact that many companies locate their production facilities in China, purchasing a popular brand gas boiler is better than buying a little-known device.

To make your choice easier, here is a list of the best gas boiler manufacturers:

Navien (South Korea)
Bosch (Germany)
Ariston (Italy)
Baxi (Italy)
Buderus (Germany)
Vaillant (Germany)
Protherm (Slovakia)
Viessmann (Germany)
Kiturami (South Korea)

Voltage stabilizer for a gas boiler - is it necessary or not?

After buying a gas boiler, it is advisable to install a voltage stabilizer. Especially if your network suffers from frequent voltage drops. The fact is that in the event of a boiler failure due to a power surge, it will not be possible to exchange the device under warranty. The requirement for network quality is specified in each warranty agreement. Therefore, it is better to spend extra 3–5 thousand rubles for a device with a power of up to 1 kW (and you don’t need a powerful stabilizer for the boiler) than to lose tens of thousands of rubles as a result.

The best inexpensive wall-mounted gas boilers

The main advantages of wall-mounted gas boilers are lower price and compactness in placement. They are more suitable for rooms with limited space. For example, for an apartment. The disadvantages of wall-mounted models are lower power and shorter service life, unlike floor-standing devices.

3 Navien DELUXE 24K

Best ergonomics at an affordable price
Country: South Korea
Average price: 29,800 rubles.
Rating (2019): 4.5

Gas boiler Navien DELUXE 24K is maximum comfort at minimum cost. A double-circuit thermal energy generator is used for sequential heating of rooms with a total area of up to 240 sq.m and for meeting household and household needs in hot water with a capacity of up to 13.8 l / min at t 35 ° C. A distinctive feature of the heater in the material of the primary heat exchanger is stainless steel. This fact slightly reduces the efficiency of the unit to 90.5%, but prolongs its durability due to the reliability of high-alloy steel.

Comfortable use of the water heating installation is ensured by a convenient display and visibility of instrumentation, an adapted room regulator with a remote control panel. The ease with which operational intervention in the cycling of the boiler is carried out makes it possible to significantly reduce the consumption of blue fuel during operation.

The reviews note the stable operation of the electronic circuit under conditions of periodic voltage fluctuations in the supply network, which are +/-30% of 230 V. The uninterrupted functionality is due to the presence of the SMPS (Switched-Mode Power Supply) protective chip, which complements the microprocessor. The combustion process in a closed chamber takes place without harmful failures and stops, which positively affects the life of the equipment, excluding breakdowns.

2 Baxi MAIN 5 24F

Best quality
Country: Italy
Average price: 37 820 rubles.
Rating (2019): 4.5

The gas boiler Baxi MAIN 5 24 F is an example of a double-circuit unit in the line of biothermal heating devices. The engineering solution, which combined the heating circuit with the preparation of water for hot water supply in a single hydroelectric complex, made it possible to significantly reduce the cost of the wall-mounted unit compared to heat generators equipped with separate heat exchangers. At the same time, there was no significant decrease in performance indicators. The power of the boiler is sufficient to heat an area of 240 sq.m and prepare 9.8 l/min of hot water at t 35°C.

The heat generator is designed to operate on natural and liquefied gas with a wide pressure range in the fuel pipelines. When connected to centralized gasification lines, the coverage is from 13 to 20 mbar. A high pressure threshold of 37 mbar is allowed when powered by mobile and stationary gas tanks. This indicator indicates the high reliability of the fuel equipment of the boiler.

Customer reviews emphasize that the most popular options for a gas unit are the ability to connect external controls: room regulators, weekly programmers and the provided interface with low-temperature heating circuits (warm floors).

Video review

What is the best heating boiler? Table of advantages and disadvantages of four types of boilers: gas convection, gas condensing, solid fuel and electric.

Type of heating boiler

pros

Minuses

gas convection

Affordable price

Easy to install and repair

Compact dimensions

Attractive design (especially wall models)

Profitability (gas is one of the cheapest energy resources)

It is necessary to coordinate the installation with the Gastekhnadzor service

Requires a chimney to remove exhaust gases

When the gas pressure in the system decreases, the boiler may begin to smoke

Requires the installation of automatic monitoring of gas leakage

gas condensing

Increased efficiency (20% more economical than a convection boiler)

High efficiency

+ all the advantages of a gas convection boiler (see above)

High price

Complete dependence on electricity

+ all the disadvantages of a gas convection boiler (see above)

solid fuel

Autonomy (can be installed where there are no engineering networks)

Reliability (long service life)

Low cost boiler

Economical (may be lower than gas costs)

Variability (at the discretion of the user, coal, peat, pellets, firewood, etc. can be used)

Maintenance (cheap models can give soot, soot). Frequent cleaning required

Additional space required to store fuel source

Low efficiency

Sometimes it is necessary to install forced draft to exit combustion products.

Electric

Easy Installation

Environmental Safety

Silent operation

No chimney required (no combustion products)

Complete autonomy

High manufacturability

High efficiency (up to 98%)

The most expensive type of heating (consumes a lot of electricity)

Requires high quality electrical wiring (may be problems with installation in older houses)

1 Vaillant turboTEC pro VUW 242/5-3

High efficiency with maximum reliability
Country: Germany
Average price: 53,700 rubles.
Rating (2019): 4.5

The leading line of the rating is not the cheapest in the category, but the most reliable and efficient gas boiler Vaillant turboTEC pro VUW 242/5-3. The craftsmanship of German manufacturers knows no bounds: for more than ten years of production, this model has heard mostly laudatory reviews regarding various aspects of the design and operation.

A double-circuit boiler can be used not only as a heater: when a source of cold water is connected to it, it no less brilliantly copes with the functions of a boiler. The maximum temperature of the DHW circuit is 65 degrees Celsius - for home use, this is more than optimal. 24 kW of power is enough to heat residential areas up to 240 square meters. In this mode, Vaillant turboTEC pro VUW 242/5-3 shows the highest efficiency value - about 91%. It is also worth noting the presence of six levels of protection, electronic control with the ability to modulate the flame, as well as a six-liter (generally standard) expansion tank.

The main shortcomings of the model affect the purely marketing side of the manufacturer. The cost of servicing Vaillant boilers is very high, and the owner will incur costs both for the purchase of a branded part and for its subsequent installation (about 50 to 50). Fortunately, serious breakdowns of the units are extremely rare.

The best gas boilers with floor installation from the budget category

Floor gas boilers are considered more reliable and durable. They cost more than wall-mounted models, but they win in terms of power and can heat rooms from 200 sq. m. For the installation of floor boilers, it is recommended to use a separate room (boiler room).

3 Protherm Wolf 16 KSO

The best automation. Developed service network
Country: Slovakia
Average price: 21,200 rubles.
Rating (2019): 4.5

The non-volatile “floor speaker”, presented by the Slovak company “Proterm”, is distinguished by its surprisingly miniature dimensions. Measuring just 39 cm wide, almost 75 cm high and 46 cm deep, it fits easily into any small space. In the "Wolf" series, 2 modifications are presented, differing only in thermal power of 12.5 and 16 kW, sufficient for heating a private house with an area of 30 to 150 square meters. m.

The fact that the main production site of Protherm is located at the Vaillant plant, a world-famous German manufacturer of gas boilers, will say a lot about the quality of manufacturing. Floor-standing units are made of steel 3 mm thick, equipped with temperature and emergency controllers, a draft stabilizer, as well as a gas burner SIT (Italy). The design is easy to install and operate, and therefore does not cause complaints from users. True, it must be taken into account that the 2-year warranty for the unit applies subject to installation by a certified specialist.

2 ATON Atmo 30E

The most powerful gas boiler (30 kW)
Country Ukraine
Average price: 27,800 rubles.
Rating (2019): 4.0

A powerful single-circuit boiler of Ukrainian origin, which has everything necessary to ensure stable heating of rooms up to 300 square meters. Actually, ATON Atmo 30E performs its main task beyond praise - the absence of a second circuit for heating water allowed Ukrainian craftsmen to pay more attention and funds to improving and fine-tuning the heating function.

For normal operation, the boiler requires 3.3 cubic meters of gas per hour. This is quite a lot (especially for a budget model), but almost all the energy from the combustion of natural fuel (the efficiency of the unit is 90%) is converted into thermal energy, which, combined with 30 kW of power, results in such a vast heated area.

In general, the presence of the principle of economy is felt in the model: the designer cut off almost all “civilized” functions, leaving the boiler with only the most necessary things - a thermometer, gas control and an overheat protection thermostat. This step led to a marked increase in the level of reliability, since fewer components lead to fewer possible (elementary) failures. In general, ATON Atmo 30E is an ideal boiler for a large country house, not burdened with additional functions and the need to work as a boiler.

1 Lemax Premium-25B

The largest heating area at an affordable price
Country Russia
Average price: 27,360 rubles.
Rating (2019): 4.5

Lemax Premium-25B is an inexpensive floor convection type gas boiler. Produced in Taganrog. Able to efficiently heat a house up to 250 sq. m. with an efficiency of 90%. The low price of the device is due to the steel structure of the heat exchanger. Such material is more susceptible to corrosion than copper and cast iron heat exchangers. However, the developer has provided a special heat-insulating coating with inhibitors, which should significantly reduce the corrosion of the heat exchanger.

The boiler is equipped with everything necessary for the safe operation of the system: heat exchanger overheating sensor, thermometer, gas control. There is auto-ignition - ignition is carried out automatically. This indicates a higher reliability and efficiency compared to piezo ignition devices. The nominal pressure of natural gas is 13 mbar, that is, the boiler will operate at full capacity even at low pressure in the gas network (which is not uncommon in Russia). This is the best indicator in our review of budget floor boilers.

It is worth noting that the Lemax boiler is designed for an open heating system, therefore, when buying it, a chimney must be provided in the house to remove combustion products.

Most user reviews speak of Lemax's "indestructibility" and almost silent operation. This is an economical and trouble-free boiler at an affordable price, with a 3-year manufacturer's warranty. One of the best deals in the budget segment.

The best floor gas boilers: price - quality

Here are the most optimal in terms of price and quality floor gas boilers. The most popular units among buyers.

3 Buderus Logano G124 WS-32

Increased efficiency. Wide range of additional equipment
Country: Germany
Average price: 102,000 rubles.
Rating (2019): 4.5

The Logano line includes 4 standard sizes (from 20 to 32 kW) of low-temperature boilers, which, in comparison with high-temperature ones, are considered more profitable and safer. In addition, low temperatures in the heating system create the most comfortable conditions for a person, while eliminating strong temperature fluctuations in an apartment or a private cottage. The unit can be built into the heating system using underfloor heating, and if the heat loss at home is too high, it is possible to supplement it with radiators.

Additional heat savings are facilitated by the special design of the cast-iron heat exchanger and thermal insulation with a thickness of 80 mm. In order for customers to individually assemble the heater, the company offers an extensive selection of additional parts and assemblies, which, it must be said, are very expensive. For example, the AW 50.2-Kombi flue gas control system is offered to be bought for almost 9.5 thousand rubles, and at least 50 thousand rubles will have to be paid for the Logalux SU floor-standing water heater. Nevertheless, consumers are satisfied with the economy, ease of operation and durability of the model and recommend it for purchase.

2 Navien GA 23KN

Stability and safety of operation. Warranty 3 years
Country: South Korea
Average price: 34,000 rubles.
Rating (2019): 5.0

In June last year, Navien Rus LLC was awarded the Company of the Year award in the Best Engineering Equipment Supplier nomination. A month later, the company celebrated the sale of the millionth mounted boiler in Russia with a 3-day conference. In addition, over the past 4 years, the brand has gained 46.6% of the votes and repeatedly confirmed the title of "Brand No. 1" in the category "Boilers for heating". What is remarkable in his products, that they vote for it not only with a word, but also with a wallet?

First of all, buyers are attracted by the quite reasonable price for the unit, the appearance of which alone speaks of the unsurpassed quality inherent in South Korean technology. They are not disappointed even after getting acquainted with the technical characteristics, in particular, the presence of a 2nd circuit, a closed combustion chamber and an electronic control system with a remote control included. Despite the "overseas" origin, the model is fully adapted to Russian operating conditions and is designed to operate at a minimum gas pressure and water supply - 4 mbar and 0.1 bar, respectively.

1 Baxi SLIM 2.300Fi

Best functionality and quality
Country: Italy
Average price: 131 838 rubles.
Rating (2019): 5.0

If you are looking for a high quality and modern gas boiler from a trusted manufacturer, then Baxi SLIM 2.300 Fi is one of the best options. This is the most expensive device in our review, with a price tag of around $ 2,000, which is quite acceptable for those who do not like to skimp on quality.

Double-circuit "Baxi" is able to heat a cottage with an area of up to 300 square meters. m. with an efficiency index of 90%. It can work in a closed heating system due to the built-in circulation pump. The built-in expansion tank will maintain the optimum pressure in the heating system, accepting excess during heating and replenishing losses during coolant cooling. Baxi SLIM 2.300 Fi is one of the best boilers for underfloor heating.

The material of the primary heat exchanger here is the best - cast iron. As you know, cast iron is resistant to corrosion, durable and reliable. Of the additional functions, it is worth noting an air vent, a safety valve and pump blocking protection.

Baxi SLIM 2.300 Fi is one of the best-selling floor gas boilers in the middle and higher price segment.

The best wall-mounted gas boilers of the condensing principle of operation

During the operation of a gas boiler, condensate is formed, which can be used to generate heat. This is what happens in boilers of the condensing principle of operation, where additional energy from condensate is generated using a special heat exchanger (economizer). This undoubtedly improves the efficiency of the device.

Installing a condensing boiler saves up to 20% of gas costs. So, the efficiency of a conventional convection boiler is on average 92%, while a condensing boiler is able to operate with an efficiency of 109%. True, the purchase of a condensation model will be much more expensive than a convection one, and, perhaps, such a decision will be justified if sufficient areas are heated.

3 Baxi POWER HT 1.450

Optimum performance and safety
Country: Italy
Average price: 147,000 rubles.
Rating (2019): 4.7

Distinctive characteristics of the model are high power ratings of 45 kW, efficiency of 107.5% and the ability to save 100% power when the inlet pressure drops to 5 mbar. The device implements all modern protection methods, including protection against freezing, overheating, as well as gas control and a self-diagnosis system. The built-in microprocessor constantly monitors the state of the sensors and, in case of emergency situations (for example, a drop in water pressure, overheating or shutting off the gas supply), automatically turns off the boiler. It is also worth noting the presence of auto-ignition, an air vent and the ability to connect a warm floor.

Baxi POWER HT 1.450 is one of the most reliable premium floor standing boilers. The obvious disadvantages of the device include only a high price.

2 Baxi Duo-tec Compact 1.24

Profitable price. Minimum LPG consumption
Country: Italy
Average price: 52,500 rubles.
Rating (2019): 4.7

Baxi Duo-tec Compact 1.24 is one of the most affordable condensing gas boilers. Despite the low price, the power of the device is 24 kW with an efficiency of 105.7%. This is an excellent model for installation in a country cottage or cottage, as the boiler can operate on liquefied gas with a minimum flow rate of 1.92 kg / h. If desired, Baxi Duo-tec Compact 1.24 can be connected to the underfloor heating system. The built-in expansion tank will compensate for the expansion of the coolant. The Duo-tec Compact series features easy installation, simple operation and the ability to adapt to gas quality. They work with a power modulation factor of 1:7.

It is a pity that the boiler is single-circuit and can only be used for the heating system.

1 Protherm Lynx condensation

The combination of high power and compactness. Auto steering
Country: Slovakia
Average price: 57,000 rubles.
Rating (2019): 4.8

In Europe, traditional boilers are practically not used - they were replaced by condensing units like Protherm "Lynx". Models of this line have been produced since 2002 and still remain in demand on the market. There are quite a few reasons for popularity: here is affordability - mounted condensing boilers with similar characteristics from competitors are 1.5 times more expensive, and rich equipment, and still relevant design.

The system of forced removal of combustion products allows you to mount the device indoors in the absence of a chimney. Fuel consumption is 3.2 cubic meters. m / h and gives a saving of about 20-30% in comparison with convection devices. Thanks to two preset modes and an automatic control system with an electronic display, it is not difficult to set the desired temperature in a private house. Additionally, the developers have provided the ability to connect an external controller. Users do not complain about any breakdowns, which allows us to judge the high reliability of the Lynx.

The best double-circuit boilers

When choosing a double-circuit boiler, as well as a single-circuit boiler, special attention must be paid to power. If the residents of the house plan to take a bath often, the minimum power of the equipment should be at least 18 kW, if shower is a priority, then a less powerful unit is allowed - from 10 kW. Even before buying, it is advisable to check if the manufacturer has not stinted on the circulation pump, safety valve, membrane expansion tank and fittings in the kit.

3 Bosch Gaz 6000W WBN 6000-18 C

Patented heat exchanger design. Low noise
Country: Germany (produced in Russia)
Average price: 29,100 rubles.
Rating (2019): 4.5

Preparing hot water usually takes a long time. If you do not want to put up with such an inconvenience, take a closer look at the Bosch Gaz 6000 W WBN 6000-18 C boiler. Its plate heat exchanger is designed in such a way that water is heated in a matter of seconds. The presence of two separate heat exchangers makes the boiler more productive (30° - 8.6 l / min, 50 ° - 5.1 l / min) and not demanding on water quality.

Among other advantages of heating equipment, the minimum noise should be noted - many users compare the sound of a working boiler with the noise of a computer or refrigerator. Efficiency is another Bosch feature. It is proposed to provide it with the inclusion of the "Eco" mode, which provides for heating water only when it is withdrawn. If the most flexible automatic adjustment is required, it is possible to connect external regulators to the built-in automation, allowing you to control the system remotely.

2 Ariston CARES X 15FF NG

Fine temperature adjustment. Sophisticated security system
Country: Italy
Average price: 35,500 rubles.
Rating (2019): 4.7

The Ariston CARES series are the most compact traditional and wall-mounted gas boilers. The 15-kilowatt unit is intended for installation in heating systems of small private houses, dachas and apartments, in the limited space of which its dimensions - 400x700x319 mm - take root very well. And it’s very handy that the unit’s setting allows you to set the temperature of the heating circuit with an accuracy of 1 °, thereby ensuring an ideal microclimate in a small room.

The design is assembled according to a modular principle, due to which the number of threaded connections - points of potential leaks - has become minimal. Built-in safety systems such as gas control, anti-freeze mode, safety valve are responsible for the smooth operation and increase the safety of the device. And at the same time, the manufacturer provides all the necessary options for comfortable operation - a large electronic display, auto ignition, status indication and the ability to connect external control. Of course, this unit deserves a place in our rating!

1 Rinnai RB-207RMF

The best digital technologies. 18 Japanese patents
Country: Japan
Average price: 52,800 rubles.
Rating (2019): 4.9

The Japanese are not in vain known as techno-freaks - they even managed to stuff the Rinnai RB-207RMF gas boiler with the most modern electronics. What makes it unique is, first of all, the algorithm for automatically maintaining the optimal ratio of the gas-air mixture in the working chamber. The process is controlled by the "brain" with touch sensors. This achieves an unprecedentedly wide power output range from 17 to 100% and, as a result, a reduction in gas consumption and an increase in the service life of the primary heat exchanger.

You can control the model from the Standard modification remote control (supplied in the basic kit), Deluxe or Wi-Fi. With it, you can program an individual mode of heating and hot water supply, which will be maintained automatically depending on the indicators of sensors outside and inside the building. Changes in the settings are duplicated by the voice navigator. 2 microprocessors are responsible for safety at once, controlling and correcting each other's work. This is not a boiler, but a space rocket, not otherwise!

You brought a gas pipeline to a country cottage either. The next step is the choice of heating gas equipment. The task is not easy - the variety of household boilers in online stores will bewilder any inexperienced homeowner. Accordingly, our goal is to consider the existing types of units and explain how to choose the right gas boiler for heating a private house, cottage or apartment.

What you need to know when choosing a heater

You can’t just go to the store and buy a gas heating boiler. To select a suitable model, it is necessary to prepare a list of requirements for the unit - to determine the thermal power, the necessary functions, the method of installation and other initial data.

What items are on the list:

Calculate the amount of heat required to heat a cottage or apartment.
Outline the range of tasks for a gas boiler - it should only heat the building or, in addition, serve as a water heater for household needs.
Allocate a place for the installation of a heat generator. The rules allow installing gas-using heating equipment in the kitchen (power - up to 60 kW), an attached boiler room or in another separate room located near the outer wall of the dwelling.
Decide whether the boiler is to be installed on the floor or on the wall. For apartments, only the hinged version is suitable.
Consider how your heating system works. Under the gravitational scheme with natural circulation of the coolant (the so-called gravity flow), an appropriate non-volatile heater operating without electricity is selected.
Set the machine automation level according to your wishes. Examples of useful functions: maintaining the indoor temperature according to a schedule or signals from an external weather sensor, remote control via the Internet, and so on.
Estimate the prices of various boilers and find out how much you are willing to spend on a gas boiler.

Note. The rules for the placement and connection of gas-using installations intended for heating and hot water supply are set out in the publication about.

Before choosing a new or changing an outdated gas boiler for heating a private house, we highly recommend that you consult with the subscriber department of Gorgaz (or another management company). Why is it needed:

in addition to the general rules, regional offices have internal instructions that restrict the use of gas equipment, these points should be clarified;
a new or replacement boiler must be included in the project documentation, otherwise you risk getting a fine for installation without approval;
experts will help you to properly place the heat generator in the house.

In the project of the boiler house, the location of all heat generators is indicated with dimensional references to building structures

Clarification regarding internal instructions. Gorgazy often impose their own restrictions, for example, they can prohibit the installation of an atmospheric boiler next to a kitchen forced hood. The reason is the absence.

Another example: you want to remove a horizontal (coaxial) chimney from a room in an apartment building, but the office does not agree on this decision, since the protruding pipe spoils the appearance of the facade. To understand all the subtleties, you will have to understand the existing varieties of gas heaters, but first ...

We determine the thermal power of the boiler

Surely you know the popular methods for calculating the thermal performance of equipment - by area or volume of heated rooms. Allegedly, a 10 kW boiler is taken for a dwelling of 100 square meters, for a country house of 200 square meters. m - unit 20 kW.

It is better not to use these approximate methods, since specific conditions are not taken into account - the climate in the area of residence, the degree of thermal insulation of the building, and so on. We suggest using more accurate calculation methods:

According to the specific heat load per square area of \u200b\u200bthe living space, taking into account the location of the room and the number of window openings.
The same, in terms of the volume of premises.
A full calculation according to the SNiP formula, taking into account the thickness and thermal insulation of external building structures.

An example of calculating heat loss by area, taking into account the location of rooms and the number of window openings

Comment. All 3 methods are described in detail in a separate thermal calculation manual.

Knowing the heat consumption for heating the cottage, we select a gas boiler by power as follows:

if you plan to use the unit only for heating, multiply the resulting figure by a safety factor of 1.2;
the power of a 2-circuit heat generator, providing 2 points of water intake, is better to select with a margin of 1.3-1.5;
to work with an indirect heating boiler with a volume of 200-300 liters, you will need a gas single-circuit boiler with a one and a half margin of productivity (we multiply by a factor of 1.5).

Let's take an example. For heating a private dwelling with an area of 100 sq. m according to the calculation requires 9 kW of energy. The minimum power of a gas heater excluding hot water will be 9 x 1.2 = 10.8 kW, a double-circuit boiler - 9 x 1.3 = 11.7 kW. If you need to heat the storage tank, the performance of the unit increases to 9 x 1.5 = 13.5 kW. Next, we select the nearest large model from the heater line - 12 and 15 kW, respectively.

Classification of gas heat generators

All hot water boilers that burn natural gas or liquefied propane-butane mixture (LPG) are divided into groups according to the following criteria:

combustion chamber design - open or sealed (closed);
installation method - wall, parapet or floor;
the number of heating circuits - 1 or 2 (heating + hot water);
the energy carriers used are only gas fuel or its combination with firewood and electricity (so-called combined boilers).

Note. All types of heat generators are initially configured to burn methane - the main gas. To, it is enough to replace the fuel jets and adjust the pressure in front of the main burner.

Examples of combined heat generators: electric-gas apparatus (left) and dual-fuel coal-gas boiler (right)

The correct choice of a gas boiler is made according to 3 main criteria - the principle of operation (that is, the type of chamber), the installation option and the ability to additionally heat the required amount of water. Other factors are not so important, but under certain conditions can play a decisive role:

design and material of the heat exchanger - steel, cast iron, copper;
ignition method - automatic electronic or manual from a piezoelectric element;
dependence of the heater on electricity;
the ability to smoothly or stepwise regulate the power of the gas burner device (modulation);
and so on.

An important nuance. Absolutely all modifications of commercially available gas water heaters are equipped with safety automatics. According to the requirements of regulatory documents, the fuel valve of any boiler must immediately stop the supply of fuel in 3 cases:

When the burner goes out spontaneously, for example, due to flame separation by backdraft.
If the gas pressure in the supply line drops below a critical level.
In the absence of natural draft of the chimney or failure of the fan-supercharger (as an option - a smoke exhauster) in turbocharged versions of heaters.

Reference. In electronically controlled heat generators, manufacturers provide additional protection levels - they install temperature sensors, overheating and other automatic safety devices.

Classification of gas-using heaters according to various criteria

The division of gas heating installations into groups cannot be called clear. Example: devices with an open chamber are floor, wall and parapet, and some models are powered by the mains, others are completely independent. Let's analyze each group in more detail.

Differences of units according to the principle of operation

Boilers using natural gas as the main energy carrier are divided into 3 categories:

atmospheric with an open combustion chamber;
turbocharged (otherwise - inflatable) with a closed firebox;
condensing - units with a sealed chamber, capable of returning the latent heat of fuel combustion.

We will not consider the pros and cons of each group of heaters, we would rather list the design differences and operational parameters. In heat sources of the first category, the firebox communicates with the surrounding air, hence the name - atmospheric. Boiler features:

Explanation. Only units with an open firebox are able to function without electricity. In non-volatile models, fuel supply and safe combustion are handled (most often by EuroSIT). There is no electronic board and controller, ignition is done manually with a piezo button.

Turbine heat generators do not depend on chimney draft, since air is forced into the closed chamber by an electric fan, whose performance is regulated by the controller. Air is sucked in and exhaust gases are exhausted through a “pipe in pipe” coaxial chimney, laid outward along the shortest path, as shown in the photo.

Typically, a double-walled flue is placed horizontally with a slight slope towards the street to drain condensate.

Features and characteristics of pressurized boilers:

The firebox does not communicate with the air of the room, ignition and the combustion process is fully controlled by electronics.
The units are equipped with two-stage burners or modulating devices with a smooth change in performance.
The efficiency of various turbocharged devices lies in the range of 90 ... 93% - a higher figure than that of "aspirated".
The boilers need an external power supply from the house mains.

Compared to atmospheric counterparts, gas heat sources with a closed chamber are more economical and well automated. The disadvantage is the complete dependence on external energy supply, the light was cut down - the heating also “died”. For safety net, a gas turbine boiler needs an uninterruptible power supply unit or an electric generator.

Reference. In terms of price, supercharged heaters occupy a middle position between inexpensive "aspirated" and condensing units.

The device of the condensing heat generator resembles turbocharged models - the same closed chamber, fan - air blower (or smoke exhauster), double-walled chimney. The device differs in the design of the firebox and the burner of a cylindrical shape, placed inside the heat exchanger - a stainless steel coil.

How the boiler works:

In addition to dependence on electricity, the described boilers have 2 more disadvantages - too high a price and a deterioration in efficiency in certain operating modes. The essence of the problem will be revealed by our expert in the video:

Wall, fixed and parapet models

As you might guess, the boilers of the first group are hung on the wall, the second - are placed on the floor. Parapet heaters are closer in design to floor heaters, they are only attached to the wall at a level of 70-100 cm.

The installation method is not the only difference between heating units:

All wall modifications are a gas boiler room in miniature. Inside any hanging boiler is its own circulation pump, safety group, control unit and expansion tank (except for individual instances). Therefore, the wall-mounted unit always depends on the reliability of the power supply.
Heat exchangers of suspended heaters are made of copper or steel, cast iron is not used. The equipment is offered in 3 versions to choose from - turbocharged, atmospheric and condensing.
Floor boilers are equipped with heat exchangers made of steel and cast iron. In Russia and the CIS countries, affordable non-volatile devices of the AOGV type are produced, among imported models there are models with external power supply.
90% of stationary boilers are equipped with an open chamber and are connected to a conventional chimney. There are also pressurized and condensing modifications of units (as a rule, foreign production).
Parapet heaters are offered only in non-volatile atmospheric version. The maximum power of a gas wall-mounted boiler is small - up to 15 kW, efficiency - 86%. Heat exchanger - "black" steel.

A parapet-type boiler also uses a coaxial inlet / outlet of gases, and it works on natural draft without any fans

Note. The difference between the three boiler layouts, as well as the advantages and disadvantages of each option in a detailed review.

From the point of view of an ordinary user, the material of the heat exchanger does not play a big role. Copper radiators are effective, but expensive, cast iron is durable, but too heavy and fragile (it is afraid of sudden temperature changes). Stainless steel and "black" steel are a compromise option implemented by manufacturers in various boilers, regardless of the layout.

Varieties of double-circuit water heaters

The main difference between these boilers and single-circuit versions is the ability to provide hot water to the home. Water is heated by the main burner in 4 different ways:

Bithermal and plate heat exchangers are installed on double-circuit wall-mounted boilers; they are rarely used in floor versions. Only stationary units are equipped with storage boilers (with rare exceptions). Ordinary copper tube coils are used in non-volatile heaters - parapet and floor.

The bithermal copper radiator is shown on the right, on the left - a stainless steel plate heat exchanger

Security features and other goodies

Boilers that do not require connection to the house electrical network are equipped with mechanical gas automation that meets the minimum safety requirements and turns off the fuel supply in the event of an emergency (listed above). What is important: after the operation of the EuroSIT type mechanical valve, the restart is carried out manually by the user.

Floor-standing boiler "Aton" with gas mechanical automatics 710 MiniSIT

In heat generators with automatic ignition and electronic control, the system works differently:

In any emergency (the gas was turned off, the thrust disappeared, the flame went out), the valve shuts off the fuel.
After a few seconds, the controller commands the valve to open the gas, and the ignition module to spark the electrodes. That is, the boiler tends to start on its own, the maximum number of attempts is 4.
If after 3-4 ignitions the accident repeats, the unit goes into error - turns on the red indicator or shows a code on the display. Next, the intervention of the homeowner or service master is required.

Addition. The heater behaves in a similar way if the power supply fails. When the light turns on, the control unit makes 3-4 start attempts. How this happens when the ionization sensor is contaminated with soot, see the video:

We list other useful functions of modern boilers:

shutdown in the event of a drop in coolant pressure in a closed heating system to 0.3-0.5 bar (measured by a hydraulic sensor);
water overheating thermostats in both circuits (heating and hot water) also turn off the boiler burner;
built-in three-way valve and additional pipes for connecting an external indirect heating boiler;
the ability to connect a room thermostat, an external weather sensor and a remote control panel;
defrosting protection - the temperature sensor will start the boiler if the coolant cools down to a critical threshold of +5 ° С;
fitting with valve;
modulation of the flame of a gas burner - automatic smooth regulation of the intensity of combustion depending on the temperature of the network water.

Heating control using a remote control or a programmable room thermostat

Electronic control units are able to diagnose emerging problems and give the appropriate signal. If the malfunction is a safety hazard, the red light on the boiler lights up and the burner turns off, in other cases the yellow indicator lights up instead of green. On models equipped with a display, the error code shown in the instruction manual is displayed.

So, you have determined the power of the heat source, the place of installation mods and figured out the existing types of gas heaters. It remains to choose the best option.

Recommendation one. According to our experts, the optimal solution for all occasions is a wall-mounted turbo boiler with a coaxial flue. At the cost of equipment, along with installation, the device will cost less than buying an "atmospheric" and building a full-fledged chimney. One condition: no problems with power supply.

Now let's figure out which gas boiler should be chosen depending on the budget and operating conditions:

Under the gravity (gravitational) system of water heating, you must definitely take a non-volatile version of the heater - floor or parapet. The latter is suitable for a small country house with an area of 80 ... 120 m².
For a closed-type system (the wiring diagram does not play a role), any heater from the above is suitable. But it’s better to take a wall-mounted version - it’s easier and cheaper to connect the product, you don’t have to buy a safety valve, pump and expansion tank.
Connecting a wall-mounted unit with water heating and a DHW system is quite simple, the piping elements and additional equipment are included in the boiler itself
Typical conditions: the smoke channel has already been built, the building has a separate furnace room, the budget is limited. Solution: wall-mounted atmospheric mini-boiler room with a minimum set of functions.
It is also better to put a turbocharged suspension model in an apartment in a multi-storey building, since the removal of combustion products into the ventilation ducts is strictly prohibited. Make a hole in the outer wall and lay a horizontal chimney to the street, observing the indents from the windows.
A double-circuit heater correctly selected in terms of power will serve a maximum of 2 points of water intake. Products with plate and bithermic heat exchangers are implied, outdated copper coils are inefficient.
If the expected consumption of domestic water is large, you need to purchase a gas water heater or a boiler plus a storage boiler. If you don’t want to mess with the strapping, take the Protherm Medved-KLZ floor standing unit with a built-in 90 liter tank.
Floor models should be purchased as a last resort, when wall-mounted ones cannot be selected - you need more power, independence from electricity, and similar situations. Stationary gas boilers are more expensive and require additional piping.

Finally, about condensing heating equipment. Now these units are not cheap, the price is not comparable with the increase in efficiency (95% versus 93% for turbocharged vehicles). The second negative point: the more complex the boiler plant, the more expensive its maintenance and repair. Although it must be admitted that a condensing gas boiler is the best solution for low-temperature heating systems - underfloor heating.

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