Pros and cons of non-volatile gas boilers

The advantages of non-volatile units are many:

1. The main advantage is the lack of dependence on the power supply.
2. Light weight and compact dimensions that will allow them to fit into any interior.
3. High efficiency, which contributed to the increased demand for these models.
4. Work safety.
5. Ease of installation and low cost.
6. Mechanical control of all functions ensures energy savings and autonomous operation.

These units are perfect for regions where power outages are not uncommon, and also, thanks to their compact size, they will fit into small spaces. Non-volatile boilers can be installed at the facility where autonomous power supply is used, which must be used sparingly.

The disadvantages of the presented boilers include:

1. Some requirements for the heating system: pipes must be mounted at an angle; must be avoided a large number line bends; pipes must be of sufficient diameter.
2. The need for a good chimney that provides quality draft.
3. Good ventilation must be provided.
4. The need for sufficient gas pressure in the gas pipeline to support the combustion process.

Models of non-volatile wall-mounted boilers

Protherm Cheetah

A popular model of non-volatile wall-mounted double-circuit gas boilers is the Protherm Cheetah 23 MOV unit. It has a nominal power of 23.3 kW, its efficiency is 90.3%, the heated area is up to 200 m². This model has a light weight of 31 kg. It is quite compact and easy to install on the wall by yourself.

Ferroli Domina N F24

Ferroli produces a non-volatile model Domina N F24 with a power of 23.5 kW. This gas boiler has two circuits and closed type combustion chambers. This unit is able to heat a room up to 180 m² and has a fairly high efficiency = 93%. heating system hot water capable of producing up to 13.5 l / min.

When choosing a non-volatile boiler, you should take into account its features, analyze all the advantages and disadvantages, and then think about whether this unit can work effectively in the conditions of your region. Consider the fact that such a device is devoid of convenience electronic control, which is possessed by boilers powered by electricity.

Approximate size of non-volatile gas heating boilers

There is also such a problem as a mismatch between the voltage in a given area or a particular house with the required one. Sometimes such interruptions can last up to one week or even more. Under such conditions, it becomes necessary to abandon the heating systems, which require electricity, and switch to the use of non-volatile boilers.

Having foreseen all the pros and cons, you can choose one of the appliances that run on other fuels, such as coal, wood, peat, etc. Well, and if there is gas supply to the house, then there will be no problems with heating the house. There are many models of boilers on sale that can operate not only on gas, but also on solid fuels - they are called combined.

Combined heaters have one design - this is a floor version. They can be single-circuit and double-circuit. The former are intended only for heating, the latter will cope with both heating and water heating for the needs of residents.

Floor scheme - boiler Lamborghini WBL 5

Combined options are heavy, as some of their elements are made of heavy alloys of cast iron or steel. In this regard, they are not available in a hanging version.

Another option for heating devices are boilers that operate only on gaseous fuels. They can be performed both in suspended and floor versions, and also have a single-circuit and double-circuit scheme.

Video - the principle of operation of the burner of a gas non-volatile boiler

How to approach the problem of choice?

An important note - such boilers should “be able” to work in heating systems with both forced and natural movement of the coolant, which is used as water (preferably purified), or antifreeze - coolant for domestic needs.

• Natural circulation is the movement of the coolant along the circuit under the influence of gravitational forces arising from heating the water and replacing it with cold water, due to the difference in density and the correctly planned slope of the pipes of the heating system.

• The forced movement of the coolant occurs with the help of a pump installed in the system, which creates more intense pressure in the circuit. Under such conditions, the system warms up faster, thereby saving gas. But such heating is possible only with the constant availability of electricity.

What is the conclusion - when purchasing a boiler in an area with an unstable supply of electricity, you need to choose a unit that will be effective with natural circulation.

• To be considered when choosing gas appliance and the pressure with which gas is supplied in Russian gas pipelines. Usually it is 1.270 MPa. The passport attached to the heating device must indicate the permissible gas pressure for this particular unit.
• If the boiler was purchased earlier and is designed only for heating with solid fuel, then in some models it is possible to replace the igniter and install a burner to convert it to gas.
• Non-volatile heating devices are reliable, simple and easy to manage. Subject to all safety measures during installation and operation, gas boilers are quite safe. In addition, they are equipped with automation, which is triggered when the gas supply is completed or the flame disappears, completely turning off the entire device.
• There is a wide range of models of domestic and foreign production on the market. The latter are considered more economical, since they have automatic devices that can control the intensity of combustion. Domestic devices are no less reliable, but also more affordable, and they are also better adapted to local conditions and parameters.
• The boiler must be equipped with a thermostat, with which you can adjust the heating temperature of the coolant. When it cools below the set temperature, the boiler automatically turns on the heating.

• In some areas, with the onset of winter and a decrease in air temperature, the pressure in the gas supply system also decreases. This nuance must also be taken into account when choosing a model for heating a house, and buying the option that will work smoothly both at normal and at reduced pressure. Subject to these conditions, the boiler will operate smoothly at any time of the year, but, knowing the peculiarities of the local gas supply system, it is necessary to control the operation of the boiler from time to time in winter in order to prevent the heating system from freezing.

Unit installation

The installation of non-volatile heating units is carried out according to a specially drawn up plan, which is agreed with the controlling fire and gas supply organizations. It is very important to create the necessary conditions for normal operation of the device:

• maintain a positive temperature in the boiler room;
• observe fire safety regulations during installation. Combustible wall material must be insulated non-flammable materials, such as asbestos or metal sheets;
• if the boiler is installed independently, it is necessary to start it for the first time in the presence of a specialist who will check the correct installation and operation of the device .

V project plan installation of the boiler also includes a chimney system. It must comply with the established standards, which are developed by design organizations, depending on the power of the heater. The chimney must be individual for each heating device or have a section that allows you to remove the required amount from two or three devices.

According to the standards, the chimney, which is brought out through the roof and located one and a half meters from the ridge horizontally, must rise in height by at least half a meter. If it is removed through the roof at a distance of one and a half to three meters horizontally, it is raised at least to the height of the ridge.

When building a chimney, you also need to know that it should not have more than three turns, but it is better if it is perfectly straight. But, in any case, its total height in a straight line should not be less than five meters. From above, the chimney is covered with a special fungus made of metal; it will close the pipe opening from moisture and dirt.

Another version of the chimney is coaxial, it is not suitable for all types of heating boilers and a specialist recommendation is needed to install it.

Such a chimney duct does not require a large height and is arranged in the wall. Its installation will cost much less and will not be difficult. But it should be noted that, without forced electrical air circulation, it may not create the necessary traction, so the boiler will spontaneously turn off more often than with a traditional pipe. Another disadvantage is the formation of condensate inside the coaxial chimney.

Boiler models

For example, it is worth considering several models of boilers that are popular due to their functionality and convenience.

Gas boiler Viadrus G36 (BM)

This model is available in various capacities. To determine which one is suitable for a particular heating system, you need to familiarize yourself with the technical characteristics.

• Viadrus G36 is exactly the boiler that does not depend on the supply of electricity to the building. It has an atmospheric steel burner.
• For the smooth functioning of the gas valve, a thermoelement is built into the boiler, and it is able to create the right amount of electricity. Also, the device has a sensor that protects against traction overturning.
• This type of boiler is adapted to local conditions and works great, heating the coolant from 45 degrees and above.
• If it is necessary to connect a pump to this model of boilers to increase the pressure of the coolant, but you are afraid of interruptions in the power supply, you can have additional uninterruptible power supplies at home.
• For Viadrus G36 boilers, a coaxial chimney is well suited if it is not possible to arrange a traditional one for gas boilers.
• The positive quality of this unit can be considered the possibility of connecting an indirect heating boiler to it.
• When choosing a boiler, you need to stop at an option whose power is 15 percent more than required.

Gas boiler Protherm Bear TLO

Another proposed option for non-volatile boilers is Protherm Bear TLO. Its characteristics also deserve attention.

The following qualities can also be attributed to the positive characteristics of these boilers:

• work in systems with open movement of the coolant;
• have piezo ignition;
• open combustion chamber;
• the heat exchanger is made of cast iron;
• The efficiency is 87-92%;
• burner made of stainless steel;
• power is regulated in one step;
• has a winter-summer regime;
• automatic control carried out by a microprocessor;
• chimney draft is controlled;
• a heat exchanger made of cast iron is protected from condensation;
• overheating protection;
• flame intensity control;
• constant control of temperature and pressure of the heat carrier;
• operates on liquefied or main gas;
• the cooling circuit does not allow the coolant to heat up above 100-110 degrees.

Thanks to all these qualities, the operation of the boiler is not difficult even for a beginner. A sufficiently compact size with high work efficiency, as well as a neat design are also important, especially if the boiler is installed in the kitchen or bathroom.

Alas, even in the Moscow region, not all cities and towns have a high-quality and reliable power supply, to say nothing of settlements remote from the center. The voltage in country houses often differs from the nominal voltage by tens of percent, emergency interruptions in the supply of energy can last for weeks. In such conditions, it is very reckless to create a heating system based on a volatile boiler. It is wiser to use a non-volatile methane boiler that does not consume electricity from the network. What are the features of this technique and what does the market offer?

Application area

Non-volatile gas-fired boilers are used in heating systems with natural or forced circulation of the coolant, as well as in hot water systems. Prepared water can be used as a coolant, or - if it is not prohibited by the manufacturer - household antifreeze such as Hot Blood, Dixis, Warm House-65, Olga. Most often, non-volatile gas boilers are operated in the residential sector - for heating apartments, country houses of permanent residence. Less often - they are used for heating small commercial buildings.
All devices that have successfully passed certification in the Russian Federation operate on natural gas with a nominal pressure of 1274 Pa (130 mm of water column) in accordance with GOST 5542–87. When replacing nozzles (main burner and igniter), some models can operate on liquefied (cylinder) gas.

The most widespread in the Russian Federation are single-circuit non-volatile boilers designed for heating. The heat exchangers of the heating circuit are made of cast iron or steel. Models of boilers with cast-iron heat exchangers are designed for 20–25 years of operation, the service life of more affordable boilers with steel heat exchangers usually does not exceed 10–15 years.

Double-circuit models are also used - the presence of a second circuit allows you to simultaneously use them for both heat supply and domestic hot water supply (with a low intensity of water consumption). The secondary circuit coil, as a rule, is made of copper pipe, its heating occurs due to contact with the coolant.

Injection atmospheric burners are used as burners in non-volatile gas boilers.

Safety, reliability, simplicity and ease of operation of non-volatile boilers are largely ensured by the use of modern non-volatile automation units. In boilers with imported (primarily Italian and German) automation, the most significant savings in gas consumption are achieved due to the automatic modulation of the burner power. Boilers with Russian-made automation usually turn out to be the most attractive at the purchase price.

The user adjusts the temperature by setting the boiler water thermostat based on personal feelings "hot - cold". But some models can also be paired with a room thermostat mounted in the control room, which monitors temperature fluctuations and gives commands to reduce or increase the gas supply to the main burner.

In areas where in winter the gas pressure at the entrance to the house is significantly reduced, experts strongly recommend the use of non-volatile boilers that can operate stably when the pressure drops (up to 300 Pa and below), without turning off, but only proportionally reducing heat output. It is unacceptable to leave a working device for long time without supervision, since in the event of an emergency shutdown of the gas and the boiler stopping, the heating system may defrost or other property will be damaged by the cold.

Placement and installation of a non-volatile boiler, as well as gas supply to it is carried out by a specialized construction and installation organization according to a project agreed with the operating enterprise / gas industry trust. At the same time, the requirements of the equipment manufacturer for air temperature and ventilation of the room, as well as the requirements for the characteristics of the enclosing structures, next to which the boiler is mounted, must be strictly observed. Self-activity here is unacceptable, as it is fraught with serious consequences, up to the complete destruction of a heated house as a result of a gas explosion!

During the installation of a non-volatile boiler, the closest attention should be paid to chimney. The device of the chimney to which the device is connected must comply with SP 42-101-2003 "General provisions for the design and construction of gas distribution systems", meet the requirements of the "Fire Safety Rules for residential buildings, hotels, hostels, buildings of administrative institutions and individual garages. PPB-08–85” and the requirements of the “Rules for the production of work and repair of furnaces, chimneys and gas ducts”.

The chimney, as a rule, should be located in the internal main wall of the building (although options are possible). Its minimum open area is determined by the boiler manufacturer and in most cases should not be less than ½ × ½ brick. The height of the chimney above the roof of the building depends on the horizontal distance from its axis to the ridge and should be:

♦ not less than 0.5 m above the ridge, if the pipe is located at a distance of up to 1.5 meters from the ridge;
♦ not lower than the level of the ridge, if the pipe is located at a distance of 1.5 to 3 meters from the ridge;
♦ not below the line drawn from the ridge down at an angle of 10° to the horizon, if the pipe is located more than 3 meters from the ridge.

It is important that the smoke channel is strictly vertical, smooth, even, without turns and narrowing. Its height from the lower level of the apparatus must be at least 5 meters. Connection of other heating devices to the chimney of a non-volatile boiler is not allowed.

Some models of non-volatile boilers, including parapet models, have a closed combustion chamber and communicate with environment using a horizontal coaxial chimney. It is mounted in through hole in the outer wall and is supplied with a windproof cap. The coaxial chimney simultaneously carries out both the removal of flue gases and the supply of air for combustion.

Using a coaxial chimney allows you to install non-volatile boilers in rooms without a vertical chimney. This significantly expands the scope of non-volatile boilers. However, during operation, non-volatile boilers with a coaxial chimney are more often than devices connected to vertical smoke channels, are turned off due to gusts of wind blowing out the flame of the burner, or freezing of the gas duct (especially models without modulation, operating in the “ON / OFF” mode and allowing condensation to form in the chimney).

Often problems arise due to the destruction of the masonry of the wall through which the coaxial chimney passes through the condensate.

When using a heating system with natural circulation of the coolant the heated coolant from the boiler supply pipe rises through pipes to the upper floor, where it passes through the heating radiators, then descends to the lower floors, where it also gives off part of the thermal energy in the radiators, after which it enters the return pipe of the heat generator. Such heating systems are also called gravitational.

It should be noted that it is necessary to create a heating system with natural circulation of the coolant "with knowledge of the matter", correctly selecting the diameters of the pipes, maintaining the necessary angles of inclination in the horizontal sections of their laying. When building a system with natural circulation, it is necessary to take into account the requirements and recommendations of the boiler manufacturer, since the guarantee for the device depends on this.

When installing a non-volatile boiler in a heating system with forced circulation of the coolant system configuration, pipe diameters and their slopes during installation are usually not so critical. But in this case, the pressure in the heating system in working condition should not exceed the allowable one. In order to avoid destruction of the boiler heat exchanger, it is necessary to provide a safety valve in the system.

Without energy

For the operation of the automation of a non-volatile boiler, electricity supplied from outside is absolutely not required. In the simplest case, the control of the gas valve of the boiler is carried out due to the voltage that occurs when the thermocouple is heated, which is in the flame of the pilot burner, which, in turn, is manually ignited using a piezoelectric element. The voltage on the coil of the solenoid gas valve keeps it open, providing gas to the main and pilot burners. When the ignition burner goes out, the gas valve instantly stops the gas supply to the boiler, thus ensuring complete safety in operation.

What does the market offer?

When choosing a technique, it is logical to first consider the possibility of using a non-volatile boiler with cast iron heat exchanger. Unlike boilers with steel heat exchangers, where it is necessary to constantly maintain the temperature of the heating water above the dew point, when operating cast iron boilers, even at a heating water temperature of about 30 ° C, there is no fatal damage to the heat exchangers by low-temperature corrosion.

Most models equipped with a cast-iron heat exchanger are supplied to Russia from EU countries. European technique trademarks- these are Alphatherm Delta (Hungary), Alphatherm Beta (Slovakia), Attack (Slovakia), Beretta (Italy), Electrolux (Sweden), Protherm (Slovakia), Viadrus (Czech Republic), Fondital (Italy).

So, floor-standing non-volatile gas boilers Electrolux FSB-P are supplied in the power range from 14 to 60 kW. This is a fairly new line of high efficiency floor standing boilers with a cast iron sectional heat exchanger made of lamellar gray cast iron with high performance.

Thanks to the application new technology DROP STOP The heat exchanger of the Electrolux FSB-P boiler is resistant to hydraulic shocks and thermal deformations.

The use of NANO FLAME technology, even at a gas pressure of 350 Pa, ensures stable ignition and long-term uninterrupted operation of an atmospheric gas burner. This technology allows the boiler to continue to work even when the pressure in the line drops to 220 Pa.

The burner of the Electrolux FSB-P boiler is protected from burnout by preventing the surface of its flame tubes from heating to critical temperatures.

Manufacturers of non-volatile gas boilers with cast-iron heat exchangers from Russia and the CIS countries often create devices using imported components, which makes it possible to obtain equipment of sufficiently high quality, the price of which is approximately 10-15% lower than that of imported products with similar characteristics.

As an example, we can cite a line of cast-iron non-volatile boilers "Titan N" from CJSC "Gaztekhprom" (Ryazan) with a nominal heat output of 25 to 60 kW, which are equipped with gas valves and control units SIT (Italy) with a full safety group corresponding to all domestic and European requirements.

Coppers "Titan" are completed with atmospheric torches of firm POLIDORO (Italy) with fire pipes from stainless steel.

Here we also mention the Taganrog boilers "Lemax Leader GGU-ch" with a capacity of 19 to 55 kW, equipped with a VIADRUS heat exchanger (Czech Republic) made of high-quality gray cast iron 4 mm thick, as well as gas boilers Siberia KCHGO with an imported cast-iron heat exchanger, burner and automation unit, manufactured in Russia at the enterprise CJSC Rostovgazoapparat in the city of Rostov-on-Don.

Separately, it is worth mentioning cast-iron floor gas boilers KCHG from LLC Servisgaz, Ulyanovsk. These boilers use a high efficiency cast iron heat exchanger with an acicular convective heating surface, heat resistant slotted stainless steel main burners. The gas pressure stabilizer built into the gas block ensures uniform combustion of the gas-air mixture on the main burners with a constant heat output, regardless of the gas pressure in the network, without requiring adjustment.

Well-known to many buyers are KChM-5-k boilers from OAO Kirovsky Zavod, equipped with non-volatile SABK automation (version 17; 23; 36). Their undeniable advantage is their versatility - the boiler, originally designed to run on gaseous fuels, can later be easily converted to run on solid or diesel fuels, and even on waste oil.

To the main advantages of gas floor standing non-volatile boilers with steel heat exchangers can be attributed to their small weight, which is important when installing equipment in houses with "weak" walls and ceilings, increased resistance to hydraulic shocks and thermal loads, low inertia (devices quickly respond to changes in heat demand) and even more democratic than boilers with cast iron heat exchangers, price.

Among the imported equipment, we note single-circuit non-volatile floor-standing gas boilers Dakon of the P lux series, maximum power which is in the range of 18–50 kW. The devices are designed for heating various premises and can be integrated into both natural and forced circulation systems. The internal space of the steel heat exchanger of P lux boilers is formed by sections with nested economizers for the fullest use of the thermal energy of the combustion products.

DAKON P lux boilers are equipped with HONEYWELL CVI automatics and are manufactured in two modifications - “ON / OFF” (modification Z) and with two-stage power control “HIGH-LOW” (modification HL). One of the functions of the P lux boiler is a quick stop when using draft regulator, it significantly increases its safe operation.

Interesting models of non-volatile floor-standing boilers "Wolf KSO", equipped with a steel heat exchanger, are presented in the Russian Federation by Protherm. The boilers are assembled at the plant in Taganrog under the close attention of Protherm employees, which, according to the manufacturer, guarantees high quality and reliability. It is worth paying attention to AOGV - Beretta with a heat output of 11 and 17 kW, which were developed in accordance with the requirements of GOST 20219 "Household gas heating appliances with a water circuit".

In Russia, the positions of domestic manufacturers of non-volatile floor-standing boilers with steel heat exchangers are traditionally strong.

For example, the Russian non-volatile heating devices of Zhukovsky are well known. machine-building plant- single- and double-circuit heat generators of the "Economy", "Universal" and "Comfort" series with heat output from 11 to 63 kW. The devices are reliable and durable. The use of a steel heat exchanger with turbulators, a modern atmospheric slot burner and high-quality automation units in the apparatus, according to the representatives of the plant, made it possible to improve environmental parameters and increase their real efficiency.

All non-volatile boilers of the Zhukovsky Machine-Building Plant are certified by the State Standard of Russia, have a sanitary and epidemiological conclusion and a decision of the Gosgortekhnadzor of Russia for manufacture and use.

In the city of Borino, Lipetsk Region, a factory of household gas equipment Since 1997 OJSC Borinskoye has been producing non-volatile boilers equipped with a steel heat exchanger with a capacity of 12.5, 25, 31.5, 40, 50, 63, 80 and 100 kW. The plant provides warranty and post-warranty maintenance of its equipment, a “wide geography” of service centers and quite an adequate price both for the boiler itself and for its maintenance and repair.

Demand among buyers is enjoyed by thermal equipment Siberia manufactured by CJSC Rostovgazoapparat. In terms of thermal performance and design, these non-volatile boilers are not inferior to many foreign analogues. Siberia boilers use a carbon fiber heat exchanger. structural steel with a developed heat exchange area, Eurosit automation, WORGAS burner. Boilers are resistant to large gas pressure drops, have high efficiency. Basalt fiber is used for thermal insulation of the boiler.

A variety of non-volatile boilers with a steel heat exchanger is considered to be single-circuit and double-circuit parapet boilers. They are equipped with a closed combustion chamber and connected to a horizontal coaxial chimney. The boiler is mounted on the floor, against the outer wall, in which a hole (about 300 mm in diameter) is previously made for the outlet of the coaxial chimney.

V large volume parapet boilers are delivered to Russia from Ukraine. As an example, we can mention DANI parapet AKGV 7.4-U-S (new) - a double-circuit parapet gas boiler with a sealed combustion chamber with the removal of combustion products through a horizontal chimney. This model is an updated series of Dani parapet boilers with the ability to connect to the heating system both on the right and on the left side. Supplied with a coaxial chimney kit.

We also note the Ukrainian parapet boilers "ThermoBar KS-GS-7.0 S" (OJSC "Bar Machine Plant"), characterized by a long service life and an efficiency of at least 90%. The operating pressure of the boilers up to 2 kgf/cm² allows them to work with natural and forced circulation of the coolant. The boilers are equipped with a multi-section atmospheric stainless steel burner.

Parapet boilers of Impulse and BeleTo trademarks are spared from many shortcomings of parapet boilers from other manufacturers. Their heat exchangers are made of anti-corrosion steel 3–4 mm thick, which significantly increases reliability and service life (in some other parapet boilers, the heat exchanger is made of steel only 0.8–1.2 mm thick).

The BeleTo boiler can take combustion air from both outside and indoors. When taken from the room, air is sucked into the boiler body from above, and not from below, which prevents clogging of the burner. Thanks to the two-section burner, the Impulse boiler has a power control range from 20 to 100%, and the BeleTo boiler 40 -100%, which is important for the Russian winter with its wide range of outdoor temperatures during the heating season.

We hope that this information will certainly help you. We wish you success with the repair and arrangement of your home! We will be grateful for the likes in social networks, and of course subscribe - there will be many more interesting things.

A non-volatile gas boiler is recommended for areas with unstable power supply. Modern equipment connected to the power grid often breaks down and fails due to power surges in the network. This can become a serious problem in winter time. So that the heat in the house does not depend on the vagaries of the power grid, consumers choose heating devices that work without electricity.

What are non-volatile boilers?

Combined non-volatile boilers operating on two types of fuel are available only in the floor version. Gas heaters powered by gas are available in two versions:

• Floor. This option is more popular than the wall option. Boilers that work without electricity are preferred by the owners of private houses. The floor-standing type of equipment has a simple device and is available in a wide range of capacities. There are heaters that can heat more than 200 m². They are installed in a special room with good forced ventilation.
• Wall. These models are chosen by consumers who cannot allocate space for a furnace. Manufacturers not so long ago began to offer the market wall-mounted non-volatile devices. They are good for their compactness, are equipped with coaxial chimneys and are in no way inferior in performance to their floor counterparts. wall variant usually choose for a small area.

What are the features?

Previously, if the gas heater was not connected to the mains, it lost its functionality and safety. Much has changed today. Modern boilers that do not depend on electricity networks have an additional device that generates electricity - it works from the heat released during the combustion of fuel. The resulting energy feeds complex automatic systems providing stability and safety of work.

In non-volatile systems, there is no forced circulation of the coolant. The latter circulates under the influence of natural forces, it moves according to physical laws. If there are problems with electricity, circulation pumps cannot be used - the stability of the heater depends on the constancy of the coolant pressure. They produce two types of devices that work without electricity:

• single-circuit - they are bought to organize heating for a house or apartment;
• double-circuit - for heating, in parallel they provide the house with hot water.

Manufacturers also offer parapet models. A parapet boiler is a low-power apparatus. It has a closed combustion chamber. Suitable for small spaces. It can be with volatile or non-volatile automation.

Principle of operation

The autonomous heater has an igniter and a main burner. The igniter is pre-ignited, then the main burner ignites, which heats the coolant to a temperature set by the user. Having reached the set value, the device stops the fuel supply. As soon as the temperature drops to a critical value, the gas supply begins, which ignites from a burning igniter. In the absence of traction, the fuel supply is automatically cut off. The electrically independent heater system has an expansion tank, which is necessary for the liquid expanding due to heating. Ignition is carried out using a piezoelectric element, which is triggered by pressing a button.

Advantages

• The ability to work without electricity is their main plus. There is no need to do wiring, install a socket, this saves money.
• Simple design and safe use.
• Versatility - suitable for heating houses and apartments of different sizes.
• Silent operation - no pumps making noise.
• High efficiency.
• Durable heat exchangers.

Flaws

• It is not possible to achieve full circulation in the system. There can be many reasons, for example, the calculation of the thickness of the pipes. In such a system, it is extremely important to correctly calculate the diameter of the pipes and install them at a special angle. As a result, uneven heating of the room is possible.
• For correct operation, a chimney with strong draft is required. Lack of draft will cause the equipment to stop, the reverse draft valve will operate. The chimney must create a vacuum in the furnace from 16 to 20 Pa.
• Efficiency at the level of 90%, the average volatile boiler has an efficiency of about 93%.
• The temperature is controlled manually.

How to choose?

It is not so easy to choose a non-volatile boiler of foreign or Russian production on the market - there are too many brands, models, and design options. Imported ones are considered more economical, domestic ones are more affordable and better adapted to operating conditions. When choosing a model, it is necessary to take into account the pressure in the gas pipeline, at what minimum pressure a particular model is able to function. Next, the power is determined - 1000 W per 10 m².

When choosing a model, it is important to pay attention to the material of the heat exchanger. There are copper, steel, cast iron. Preferably - cast iron, it is stronger than steel and it has a longer service life. Cast iron heat exchangers can last up to 30 years. The walls of cast iron elements are thicker than those of steel counterparts, and they are more resistant to corrosion. Another criterion worth paying attention to is that a device that does not depend on electricity cannot be with a closed combustion chamber. Turbocharged models do not work without electricity, as they need forced circulation of the coolant, air injection and exhaust gas removal.

Non-volatile or volatile - which is better?

In volatile models, unlike their non-volatile competitors, there are:

1. Circulation pump to ensure the movement of the coolant. It excludes air locks and uneven heating.
2. Fan for forcing outdoor air into the chamber of turbocharged boilers.
3. More advanced automation that selects the most economical modes for the device. It is possible to program the operation taking into account the time of day and days of the week. The operation of the boiler is controlled by internal thermostats located in the rooms.

Thanks to circulation and forced draft, less stringent requirements apply to energy-dependent versions:

• there are no strict requirements for room ventilation;
• you can use a closed expansion tank, placement is free;
• do not need to comply with slopes;
• it is allowed to use pipes large diameter.

Can a volatile heater work without electricity? No, during a power outage, the device does not work, and the house remains without heat. This is the only downside. There is a solution, but it requires additional costs - connecting a generator. It turns out that volatile models are more perfect and convenient to use, and if there is a reliable power supply, then the choice would be unambiguous. Non-volatile analogues are indispensable in situations where uninterrupted and high-quality power supply cannot be provided.

Manufacturer's choice

Having decided on the type of boiler - single or double-circuit, wall-mounted or floor-standing, it remains to choose a brand. The reliability rating is predictably headed by German manufacturers, whose products have only one drawback - too high prices. That is why consumers often pay attention to cheaper Italian brands - and others. But the most popular, according to sales statistics, are domestic devices on the market - Rostovgazoapparat, Mimax KSG, Siberia KCHGO, Volk, Borinsky AOGV, AOGV and AKGV, Premium, ROSS AOGV. Also, products manufactured by Ukrainian factories have proven themselves well; Atem Zhytomyr is especially popular in Russia.

Model overview

Protherm Medved TLO

Floor single-circuit devices with an open fire chamber. Completely energy independent. Power range - 18–45 kW. Specifications and design features of "Proterm Medved" 20 TLO:

• power - 18 kW;
• heating temperature (min / max) - 45–85 ° С;
• dimensions (HxWxD) - 880x420x671 mm
• weight - 92 kg;
• maximum gas consumption - 1.9 m³ / h;
• heats an area up to 135 m²;
• piezo ignition;
• cast iron heat exchanger with condensate protection;
• single-stage power adjustment;
• modes "Winter" and "Summer";
• switching to liquefied gas is possible;
• automatic microprocessor control;
• Efficiency - 90%.

There is a built-in water heater. Reliable system safety: there is protection against a drop in gas pressure, against overheating of water and against flame extinction. It is compact, has a stylish design, will look good in the kitchen. Estimated cost - 55 000 rubles.

Baxi SLIM EF

Double-circuit floor version from the Baksi brand. Is different stylish design- gray body and black adjustment panel. The burner is atmospheric. The heater device has a high sensitivity thermocouple, which promptly stops the gas supply when the flame goes out. They are connected to systems with natural circulation of the coolant. Their maximum power is 61 kW. Estimated price - 45 000 rubles. For example - BAXI SLIM EF 1.22:

• power - 22 kW;
• maximum temperature - 95 °C;
• dimensions (HxWxD) - 850x400x595 mm;
• weight - 101 kg;
• maximum fuel consumption - 2.64 m³ / h;
• heating area - 176 m².

Protherm Cheetah 23 MOV

Wall-mounted versions that work without an electrical connection are much more modest on the market. "Gepard" 23 MOV from the brand "Proterm" has two contours. With a weight of 31 kg, it is easily fixed to the wall. Draft - natural, smoke removal - through a conventional chimney. The approximate cost is 33,000 rubles. Characteristics and design features:

• 23.3 kW;
• maximum gas consumption - 2.73 m³ / h;
• Efficiency - 90.3%;
• heats an area up to 230 m²;
• primary heat exchanger - monothermal;
• steel plate type heat exchanger for hot water supply;
• switching to liquefied gas.

Viadrus G36

Products of the Czech manufacturer. A steel atmospheric burner was supplied. In order for the gas valve to function smoothly, there is a built-in thermocouple capable of generating electricity in the right amount. There is also a sensor that prevents tipping of the thrust. Adapted to local conditions. You can connect a pump to increase the pressure of the coolant, and if there is a danger of power outages, an uninterruptible power supply is connected. You can also connect an indirect heating boiler. The price is about 52,000 rubles. Characteristics Viadrus G36 BM 3:

• 17 kW;
• heating - 45–85 °С;
• one circuit;
• Efficiency - 92%;
• heating - 128 m²;
• maximum gas consumption - 1.98 m³ / h;
• weight - 100 kg;
• dimensions - 935x485x733 mm.

Mounting Features

Gas heaters that do not consume electricity operate in conventional gravity heating systems, which have a lot of disadvantages. The main ones are insufficient temperature stability in the premises and high fuel consumption. That's the price for offline work. Since there is no forced circulation, such boilers are located at the lowest points of heated buildings so that water flows to the place of heating.

The heating circuit, independent of electricity, has a special wiring. Pipes must be of a larger diameter than in the case of circulation pumps. The location of the pipes - with a slope. It is necessary to strive for the optimal number of branches and turns so that the coolant pressure does not decrease below normal. An expansion tank is required: its absence can provoke a pipe rupture.

Boiler Protherm 40 TLO (35 kW)

Heating systems independent of electricity are installed in areas and settlements where there are serious problems with energy supply. Installing a non-volatile gas boiler is the only way to maintain a comfortable temperature in the room. These devices are used in gravitational heating systems, where the coolant circulates through pipes under the action of gravity and thermal expansion of water. Equipment manufacturers offer single- and double-circuit versions of such devices.

The principle of operation of the boiler

The equipment does not require connection to a power supply. Structurally, it provides a thermogenerator. When gas is supplied to the combustion chamber using a piezo ignition (triggered by pressing a button), the pilot burner ignites. It burns constantly, providing, if necessary, ignition of the main source of heat. He, in fact, heats the water in the heating system.

warmed up certain temperature the coolant acts on the thermostat, which turns off the gas supply to the main hearth. Giving off heat, the water cools and activates the gas supply mechanism. The gas supply is resumed, and it ignites from the "standby" burner.

Functional Benefits

The fact that a non-volatile gas boiler can function without electricity is not the only advantage of the device. The design of its chimney also ensures the safety of operation of such equipment. The channels provide for the installation of sensors that determine the level of thrust. If it decreases or if a reverse flow occurs, the gas supply to the combustion chamber is automatically stopped.

Design and operational features provide other advantages of such boilers:

• automatic control of flame intensity;
• the presence of piezo ignition;
• long service life of the heat exchanger;
• maintaining functionality with a significant decrease in gas pressure in the system.

Many models are equipped with a remote control remote control which makes them even more convenient to use.

Installation Requirements

Single- and double-circuit non-volatile heating boilers are mounted in accordance with the requirements that ensure the natural circulation of the coolant.

These include:

1. Mandatory observance of slopes of pipelines in which water circulates.
2. Using a large diameter pipe to reduce resistance in the path of the coolant.
3. Additional system installation expansion tank where excess hot water will go.

In addition, it is necessary to strictly adhere to the standards for the installation of gas equipment. In particular, this applies to the installation of a ventilation and exhaust system.

Important! In case of violation of the requirements and norms of state standards, accumulation of carbon monoxide in the room is possible. This is dangerous not only for health, but also for the life of all family members.

Involvement in the installation of the system of persons who do not have access to this type of work is strictly prohibited. All work is carried out by specialists who have passed the appropriate accreditation.

Boiler model options

A non-volatile floor boiler is more popular with consumers than a wall-mounted counterpart. It is characterized by simplicity of device and reliable operation. Manufacturers offer equipment different power, which allows you to choose the best option for small dacha and for apartments over 200 square meters.

Install non-volatile floor boilers in a separate room where you can easily arrange good ventilation. An open combustion chamber takes air from the room, and the exhaust gases are discharged through the chimney.

If it is not possible to allocate a separate room or build a furnace, then you should purchase a wall-mounted counterpart. Relatively recently, suppliers began to offer non-volatile gas wall boilers. They do not take up much space, can be equipped with coaxial chimneys and have all the advantages of outdoor counterparts.

Modern models no longer require the mandatory presence of a gravitational heating system. They are perfect even for the hidden location of heating mains. In this case, the circulation pump must be installed separately.

Important! The pump must be installed on the return line and pump water into the boiler, and not vice versa. This will ensure efficient utilization of the heater and prevent it from operating with a small amount of water in the heat exchanger.

The pump is mounted through a bypass of a suitable diameter. It is advisable to put 2 taps at the inlet and outlet of the bypass, and also put a tap on the main line (it closes in case of operation forced circulation). In this case, it is possible to replace or repair the injection device without draining the water from the entire system. And to extend the life of the pump, you should install a strainer in front of it.

As you can see, different options for gas boilers can be a great alternative to electric ones in cases where there are some problems with the power supply. They are simple in design, easy to use and quite affordable.