Gas convectors - independent heating equipment representing a real alternative to traditional heating appliances. They provide not only the ability to maintain a predetermined temperature within the range of 8 to 33 ° C in a heated room, but also allow you to set different temperatures in different rooms.
Convectors work on the principle of natural gas combustion in a metal heat exchanger, which ensures highly efficient heat transfer to the room. At the same time, combustion products are discharged to the outside and combustion air is taken in. This provides ecological cleanliness rooms and efficient ventilation.
Compared to a traditional heating system, which requires boilers, radiators, piping around the room, fittings, pumps and other components, when using convectors, all this equipment is not required, since there is no water circuit. It is this feature gas convectors allows them to be used for efficient heating country houses, cottages, garages, greenhouses, etc. The gas-air mixture in these devices is ignited either by a spark from the electronic unit or by the wick of the ignition pilot burner, which, in turn, ignites when the button of the built-in "piezo lighter" is pressed. In the latter case, the supply of electrical energy is not required.
Rice. 91. : A - general form; B - section (in mm); 1 - igniter; 2 - control panel; 3 - tray for ignition of the burner; 4 - impulse lines; 5 - gas valve; 6 - chimney
An example of such equipment is the gas-air heater AOG-5, appearance and the installation option of which is shown in Fig. 91. The device is designed for space heating up to 30 m2. The main components of the device: housing, combustion chamber with a smoke outlet and an air supply channel, a wall channel with a grate, an electromagnetic valve with a thermocouple, a piezoelectric ignition device. The control panel for the gas valve, the buttons for turning on the solenoid valve and the ignition device are located on the front wall. The device does not require a special chimney, as it is equipped with a wall channel through which combustion products are removed and outside air is supplied to the furnace. The heater is equipped with safety automatics that cut off the gas supply to the main and pilot burners when the igniter flame goes out. Technical characteristics of the AOG-5 air heater are shown in Table 10.
Table 10. Technical characteristics of the AOG-5 heater
| Name of characteristics | Value |
| - basic | 5810 |
| - ignition | 231 |
| Gas consumption, m3/h: | |
| - natural | 0,6 |
| - liquefied | 0,22 |
| Efficiency, % | 80 |
| Dimensions, mm: | |
| - width | 720 |
| - height | 750 |
| - depth (without chimney wall) | 250 |
| Wall channel diameter, mm | 200 |
| Weight, kg | 35 |
Rice. 92. Gas fireplace "Amra": 1 - injection burner; 2 - collector-heat exchanger; 3 - solenoid valve; 4 - gas supply; 5 - smoke outlet
The AMRA gas fireplace is a radial-convective type device (Fig. 92). The burner of infrared radiation GIIV-1 with a heat output of 35 - 46 kW is installed in a stamped steel sheet fireplace body. Primary combustion air enters the burner through openings in the bottom of the body, and the combustion products are discharged into the chimney through a heat exchanger into a pipe in the rear wall of the fireplace. Air from the room enters the walls of the heat exchanger through slotted holes in the walls of the housing, heats up and exits into the room. The fireplace is equipped with a safety automatic that cuts off the gas when the flame goes out. The device runs on liquefied gas supplied through a pressure regulator from a cylinder with a capacity of 27 liters. One cylinder ensures the operation of the fireplace in normal mode for 45 hours.
The Czech company KARMA supplies Russian market beautifully designed and equipped with multifunctional automation devices of the BETA series with electronic spark or pilot burner ignition of the main burner. Consumer and operational characteristics of this device can satisfy any, even the most refined, taste. However, the price of this heater deters the broad masses of consumers. So, heaters of the BETA-Comfort-Electronic model with a power of about 4 kW cost about 420 dollars. USA. Functionally almost equivalent, but much cheaper air heaters from MORA (Czech Republic) and FASER (Poland). Various Models of these devices have a power in the range of 2-5 kW and are very similar in technical specifications, which include:
- the ability to work on bottled and natural gases in the pressure range of 50 - 200 mm of water column;
- ignition of the working burner from the wick of the ignition pilot burner, ignited from the button of the built-in piezo lighter;
- ensuring complete safety (stopping the gas supply when the pilot burner is extinguished or in case of violation of gas-air exchange with external environment);
- automatic maintenance of the air temperature in the heated room at a given level (within +10 - +30°C) by smoothly changing the power of the burner or turning it on and off;
- quick response of the heater to possible changes in ambient temperature and optimal gas flow, which is ensured by a fast-acting steel heat exchanger;
- the ability to work stably with wall thicknesses from 5 to 60 cm.
Comparative characteristics air heaters MORA (model 6101) and FASER (model JGK-F4.2), having the same power of 4.2 kW and capable of heating a room up to 42 m2, at an average temperature of 100 W/m2 and a ceiling height of 2.5 - 3 m, are given in table 11.
Table 11. Comparative characteristics of MORA and FASER air heaters
| Parameter | MORA | FASER |
| Nominal gas flow: | ||
| - natural, m3/h | 0,41 | 0,49 |
| - liquefied, kg/h | 0,38 | 0,31 |
| Overall dimensions, mm: | ||
| - height | 627 | 400 |
| - length | 702 | 750 |
| - width | 148 | 180 |
| Weight, kg | 22,5 | 20 |
Foreign-made heaters can compete with " heat guns"TROPIK" series of domestic production. These fan heaters have a unique and most complete set of consumer qualities and a number of advantages over any domestic analogues, but comparatively low price allows them to successfully compete with the famous imported trendsetters of "heating fashion". A wide range of models (heating power from 2 to 15 kW) makes it possible to choose the right TROPIC model, and lovely design will fit well into the interior of any apartment or office. The silent fan makes listening to quiet music a breeze, and convenient system control provides the ability to work at full or partial heating power. Fan heaters "TROPIK" are equipped with a double thermal protection system (bimetal thermostat and thermostat), which will eliminate overheating and disconnect the device from the mains in case of an emergency.
As soon as these products are not called, starting from “fire heaters”, “heat guns”, simply “burners” and further - “gas heaters”, “gas furnaces”, “hot (warm) air generators”, “air heat generators”. The most common (correct) name is still gas air heaters and, when viewed from the air handling units, gas heating sections. What are gas air heaters? According to the method of air heating, there are air heaters using indirect air heating (they are sometimes called recuperative air heaters) and direct heating air heaters (the so-called mixing type). Direct air heating is when there is no combustion chamber and heat exchanger (photo 1). The burner flame directly heats the air. Modern systems of combustion allow highly efficient combustion of natural gas, however, when designing, it is necessary to calculate the reduction in the concentration of harmful substances entering the room with combustion products below 30% of the MPC. These units are especially effective at high air exchange rates, when the level of harmful substances emitted indoors significantly exceeds the level of combustion products from direct-heated gas air heaters: foundries, welding shops, etc. Thermal power range 40-1500(2000) kW.Due to the lower metal consumption, mixing gas air heaters are cheaper than recuperative ones, they are characterized by a large power range and the absence of a chimney, i.e. combustion products are immediately mixed with heated air - no need to think about combustion products condensate when working with negative temperatures street air. Such gas air heaters are widely used in the USA, Canada, Great Britain. There are manufacturers in France, Germany and Holland. In Russia, they are still relatively rarely used, although we also have several domestic manufacturers. Indirect heating is when air (recirculation and / or supply air) is fed into the unit with the help of a fan (axial, centrifugal), after which it heats up, passing around the combustion chamber and through the heat exchanger, while the combustion products are removed through the chimney (photo 2). The heated air thus obtained is then discharged either directly into the room or through a duct system. Gas air heaters of indirect heating (recuperative air heaters), in turn, are conditionally divided: 1. Air heaters with a built-in atmospheric burner or air heaters with a tubular heat exchanger (photo 4).
circuit diagram(photo 3): atmospheric burner at the inlet, i.e. operating under atmospheric pressure and consisting, as a rule, of several nozzles / nozzles (similar to any home gas stove). Further, after the tubular (plate) heat exchanger at the outlet, there is a smoke exhaust fan, thanks to which the combustion products pass through the heat exchanger. Advantages: simple design, which means competitive price. Disadvantages: ❏ small range of thermal power: 15-150(200) kW, to provide more thermal power, these heat exchange modules are installed in series and / or in parallel, which leads to an increase in cost this decision; ❏ Difficulties when necessary to work in mode condensation of combustion products. 
2. Air heaters (heat exchange modules) with an additional fan (inflatable, blast) burner (photo 5). Schematic diagram: a fan burner (i.e. with a fan) is installed in the combustion chamber of the heat exchange module. Due to the pressure created by the burner, the combustion products pass through the combustion chamber and heat exchange pipes (channels). Thermal power range 40-1000 (1200) kW. More expensive solution in comparison with atmospheric burners corresponding in terms of thermal power, but a larger power range, it is easier to solve the problem with the formation of condensate of combustion products - it is possible to use diesel burners.
Intermediate conclusion: at the moment, due to the small range of thermal power, it is advisable to use gas air heaters with an atmospheric burner for small air handling units or monoblock (roof top) air conditioners. For large central air conditioners and air handling units, gas air heaters (heat exchange modules) with an additional fan burner are more competitive. Further, in more detail about the version of the gas heating sections, consisting of a heat exchange module (air heater) and a fan (inflatable) burner. Materials used for the manufacture of the heat exchange module The heat exchange module for the fan burner conditionally consists of a combustion chamber and a heat exchanger following it. Most manufacturers use the following materials. The combustion chamber is made of stainless steel AISI 430 (GOST - 12X17) when working with air heated to a maximum of 120 ° C. For combustion chambers and various connections when air is heated to temperatures from 120 °C to 280/300 °C and when the degree of air heating (Δt) is more than 80 °C, AISI 310 heat-resistant stainless steel (GOST - 20X23H18) is used. Sometimes different thicknesses of steel for combustion chambers are used at different air pressures and temperatures. With the exception of product condensation combustion inside the heat exchange module, the heat exchanger pipes can be made of carbon steel, for example, steel S235JR (GOST - St3sp) or aluminized steel. In the event of a possible product condensation combustion in a heat exchanger, it is necessary to purchase an air heater with a heat exchanger made of acid-resistant stainless steel: AISI 316 (GOST - 08X17H13M2), AISI 441 (there is no analogue in GOST according to DIN X2CrTiNb18), AISI 304 (GOST - 08X18H10) and, in extreme cases, AISI409 (there is no analogue in GOST according to DIN X2CrTi12), in which condensate drain must be provided.
The phenomenon of formation of condensate of combustion products directly in the heat exchange module itself is due to increased cooling of this module. At a constant nominal air flow, this can be caused by a low supply air temperature or a decrease in the heat output of the burner below 60-65% of the nominal when operating on 100% recirculated air. One way to reduce the volume of flue gas condensate inside the heat exchange module is to organize a bypass line that operates depending on the temperature of the flue products in the chimney (photo 6). What gases can be used for gas air heaters? There are so-called liquefied petroleum gases, ie. gases that are associated with oil production. Or more often they are called liquefied hydrocarbon gases (LHG): propane (symbol G31, chemical formula C3H8) and butane (G30, C4H10). These gases are also called heavy hydrocarbons, propane and butane, in contrast to natural gas, are heavier than air and are more explosive in case of leaks, because. do not disappear, but spread along the floor, fill niches. It is a mixture of propane-butane that is sold for household needs in cylinders at retail. Almost any gas burner, when replaced with a nozzle (membrane on the gas valve) and reconfigured, can work with liquefied carbon gases.
In principle, at any facility it is possible to make a gas station with tanks for LPG (gas holders), but since liquefied petroleum gas is not fundamentally cheaper than diesel fuel (one and a half times, while natural gas is cheaper than diesel fuel by more than seven times), according to experience for industrial facilities, this is a very rare option, so we don’t dwell on it anymore. There is also such an exotic option - liquefied natural gas, i.e. liquefied methane. Liquefied natural gas (LNG) is cheaper than LPG, but since we have placed the main emphasis on gas pipelines — facilities using LNG are unique in Russia. Finally, consider the most common case: natural gas - methane (G20, CH4). Gas pipelines (gas networks) for natural gas are divided into: ❏ low pressure gas networks - up to 0.05 kgf/cm2 (50 mbar or 5 kPa); ❏ medium pressure — from 0.05 to 3 kgf/cm2; ❏ high pressure— from 3 kgf/cm2.
For different types of premises, different gas pipelines can be used. In our case, we will talk about a gas pipeline of medium or low pressure. The inlet pressure of natural gas for atmospheric and premix burners is only low (20 mbar), for which, as a rule, additional reduction gears must be used when connected to the gas pipeline. The inlet pressure of fan burners (photo 7) may be different depending on the gas train (multiblock) used. The lower range depends on the characteristics of the rail and the heat exchange module (combustion chamber), often 20 mbar, the upper threshold depends on the diameter of the gas train (the characteristics of the gearbox built into it) and is usually a fixed value (100, 360 or 500 mbar). That is, fan burners can operate with low (up to 50 mbar) and medium pressure natural gas (from 50 mbar). Air heaters (heat generators) with an additional fan burner can also be operated using diesel burners. Or combination burners can be used, operating alternately with both gas and diesel fuel. In fact, if there is no frequent change in the type of fuel, the object must first be launched on diesel fuel, and later transferred to natural gas, because it is much cheaper to install a diesel burner first and then buy a gas burner than to immediately purchase a combined one. Projects with diesel burners, probably, on average, one in 30 gas burners, so we will omit the nuances of arranging fuel lines for diesel fuel. Main Feature similar projects for air handling units, i.e. projects when using the considered diesel burners, it is necessary to avoid operation in the mode of condensation of combustion products without fail. Gas and diesel fan burners, automation Air heaters (heat exchange modules) can only be equipped with certified gas or diesel fan burners. Depending on the task, such burners can be: single-stage - operate at one fixed power; two-stage - operate at two pre-set power values (low and high); modulating - the power of its work can smoothly vary from minimum to maximum values.
The selection of the burner is carried out according to the power of the heat generator and the back pressure created in the combustion chamber, in addition, it is necessary to take into account the length of the burner nozzle. The length of the burner nozzle must be within the range specified by the manufacturer of the heat exchange modules. Air heaters (heat exchange modules) are equipped with a thermostat block that provides internal logic of operation and safety of the heating section, but does not control the temperature in the heated and/or ventilated room. Automation for controlling the temperature in the room (in the air duct) is a separate issue, depending on the task and the burner used. Features of placement of air handling units with gas heating 1. When placed indoors (photo 8). If inside a heated room - see NPB 252-98 "Heat generating devices operating on various types fuel. Fire safety requirements. If in the ventilation chamber (photo 9) - see SNiP II35-76 * “Boiler installations” for placement standards.2. Outdoor installations. The easiest option in terms of approvals / norms, but there are nuances in execution. Also, do not forget about the features of maintenance "outdoors". Standard (typical) European floor air heat generators (air heaters) in case of outdoor version are designed for long-term reliable operation at temperatures down to -15 (20) °C. The automatic burner allows it to turn on at temperatures not lower than -15 °C. In this case, usually the burner and the electrical panel are simply covered from above with a casing of sandwich panels (photo 10). In most cases, this is enough, because. the burner during operation heats itself and the space around. There are examples when even such a standard version normally serves in the most difficult climatic conditions. Russian conditions not one year.
Photo 11 shows an example of a more thorough execution of a gas heater section in the case of its outdoor placement. The burner section is insulated not only from the top and sides, but also from the bottom. Grids are made for ventilation of the section (air supply for combustion). In regions where winter can be especially low temperatures(below -30 °C), additional heating of the burner section is required. Most often, an additional one is installed inside the block with a burner. electric heater, sometimes they make the flow of warm air into the section with the burner from a heated room or from ventilation duct after heating the air. When is it advisable to use gas air heaters In general, a gas air heater (i.e. a supply unit with a gas heating section) turns out to be more expensive in terms of capital costs of a similar installation with water (electric) heating, but, on the other hand, a gas air heater will always be cheaper than a bundle "boiler room + water supply unit" of a similar heat output.
Accordingly, gas air heaters are most competitive when there is no parallel large boiler house (heating main), and a small boiler house is used, for example, for some small administrative building (office center) and / or hot water supply (photo 12). That is, gas air heaters are used to build one system air heating and ventilation: production premises, warehouse, shopping mall, cinema or gym. As a rule, in this case, in supply units (air heaters), mixing chambers are provided for simultaneous operation with supply and recirculated air. Maybe? to heat and/or ventilate especially fire hazardous premises by supplying 100% superheated supply air, but such installations are complex and expensive. Initially, the main purpose of gas air heaters is air heating. A gas air heater in the mode of a clean supply unit, which solves only the problem of ventilation, is used for rooms heated by gas infrared heaters (radiant heating) or hinged gas air heaters (gas air coolers). Currently, there are several types of units with gas air heating on the market. The first type is floor air heat generators (gas air heaters). Such devices usually consist only of a heat exchange module and a fan section. The second is monoblock rooftop air conditioners (in English they are called Roof Top), which, in addition to the cooling section, can have a heating section on water, electricity or gas. Finally, the third one is custom-made supply and supply and exhaust units with a gas heating section. It is clear that the use of standard solutions means lower capital costs, but sometimes the only acceptable option is custom-made units, equipped, for example, with recovery sections, humidification and other additional equipment. On this topic, we consider it open, it is better to clarify some nuances on a specific task with a specialized specialist.
To have a dacha or outside the city is a longed-for dream of many residents of modern megacities. Fresh air, tranquility, moderate physical work on the site, the absence of crazy city fuss - what else is needed for good rest! Therefore, happy dacha owners try to spend as much time as possible there, often completely moving out of town for the entire summer season. Yes, and at other times it is very good in nature, and trips to the country on weekends or holidays are practiced throughout the year, and often country estates even become the main “residence” of the owners.
But fresh air and a calm, peaceful environment are not the only components of this home comfort. The premises must be maintained at a comfortable temperature level for residents, and this often becomes a problem. This is especially true when visiting a dacha in spring, autumn or winter, but the summer of 2017 shows that no one is immune from the cold even in such a seemingly favorable period. Not everyone has a real brick oven in their dacha, and you have to fiddle with it for a long time in order to warm up the premises during a short-term collision. Electric heaters- quite "gluttonous" in terms of spending expensive energy. But there is a very good solution that modern heating appliances- These are gas heaters for summer cottages.
Let's get to know them better - how they are classified, what principles of work are laid down in them, how to approach the choice optimal model.
Varieties of gas heaters and the principles of their operation
Approximate classification of gas heaters, their general advantages and disadvantages
It would seem that the device for such heaters is common, and is based on the principle that a burning flame heats the air, which, in turn, provides a normal temperature in the room. However, this is not at all the case. The device of many modern appliances based on the use modern technologies generation and transfer of heat. So both the design and the principle of operation of different types gas heaters can vary dramatically.
All gas heaters can be classified into several groups:
- Thermal gas guns (powerful fan heaters).
- Ceramic gas heaters.
- Gas convectors for stationary installation.
- Heaters gas catalytic action.
- Compact portable gas heaters.
- Outdoor infrared heaters.
Despite the differences in design and operating principles, all devices of this type have approximately the same advantages and disadvantages.
The advantages include the following:
- Natural gas, network or liquefied, is the most affordable of all other types of energy carriers in terms of cost. That is, such heating does not require significant operating costs. Some models also require connection to the power supply, for example, to ensure the operation of fans and the operation of control units, but their electricity consumption is minimal and will not put an additional burden on the family budget.
- The design of most gas heaters is quite simple, does not have complex components, which increases the reliability of such devices.
- Modern heaters have a very decent efficiency, that is, this indicates the economy and efficiency of their work.
With some exceptions, gas heaters are highly mobile - they are small in size, easily moved from place to place, transported in a car. Many models can even be taken with you on a hike, fishing or just when going out into the countryside.
- Work of gas heating appliances causes minimal damage to the environment - the products of complete combustion of gas are practically harmless.
- The devices are usually easy to use.
- Warming up the premises is carried out very quickly - such devices are not characterized by inertia in operation. For the same reason - gas heaters are very sensitive and quickly respond to changes in settings.
- Modern products of this class are equipped with multi-level protection systems, which minimizes the likelihood of dangerous situations.
- Most devices are distinguished by enviable durability - they are able to serve faithfully for 10 years or more.
Nevertheless, despite the numerous "pluses", it is not complete without negative aspects:
- In any gas appliances, it is impossible to completely eliminate the problem of fire hazard, since flammable fuel is used, and work is accompanied by high-temperature heating. These heaters require special measures precautions. It is unacceptable to leave them unattended if there are young children in the house.
- By itself, unburned natural gas is very toxic, and any leakage of it can cause very serious poisoning, up to the most sad consequences. That is, it imposes additional requirements for the safety of operation.
- The process of gas combustion requires a constant supply of oxygen, which in many models is taken directly from the room where the device is installed. This means that it is necessary to carefully consider the system of supply and exhaust ventilation so that an uncomfortable, difficult, and even dangerous atmosphere for human health is not created in the rooms. By the way, the requirements for organizing ventilation directly refer to additional volumes of air circulation if gas appliances are planned to work in the room. And if with water or electric heating these questions are sometimes looked through the fingers, then in the case of using gas heaters, a dismissive approach to ventilation is completely unacceptable.
What ventilation standards should be observed in a residential building?
This is not an idle question, and ventilation requirements are not taken from the ceiling - they are clearly regulated by the current regulatory documents. You can read more about this in a special article on our portal dedicated to problems.
However, at correct operation such devices become reliable and faithful assistants, able to quickly and efficiently create and maintain the necessary comfort in summer residences.
Well, now consider the main types of gas heaters in more detail.
Gas heat guns
These devices really vaguely resemble an artillery piece - a large metal cylinder placed on a "carriage" - a stand.
One of the simplest types of gas heaters. The principle of operation is simple - a gas burner is placed inside the cylinder, and a conventional electric fan is installed behind it, creating a directed flow of air heated by the flame. The electrical part of the gas gun can be powered from the mains or from a battery. As a rule, such devices are designed for connection to a cylinder with liquefied gas (propane).
The advantage of such heaters can be called low cost and simplicity of design. They are mobile - they are easy to move to the right place, and for this purpose special handles are usually provided on the cylindrical casing.
Such devices are usually equipped with a piezo ignition system. Certain levels of protection and ensuring the safety of operation are also provided. So, special sensors monitor the presence of a flame, the temperature of the case, the oxygen content in the room. In the event of an emergency, the device will be automatically switched off and the gas supply to the burner will be shut off.
However, there are many disadvantages of such heaters. First of all, they are quite bulky for a living space. Direct combustion of gas requires a large volume of constantly supplied air, and the combustion products give off a not very pleasant smell. In addition, an open flame is a big safety minus.
Prices for gas heat guns RESANTA
Gas gun RESANTA
Another significant drawback in the operation of such heaters is a rather high noise level. It can reach up to 70 decibels, which is clearly too much for a comfortable environment in the house.
In a word, they try not to use such heaters in residential premises. But to heat, say, a workshop during work, a garage, a construction site or some kind of agricultural building is a very good option. Due to the directed hot flow, even a large room will be heated very quickly.
Ceramic gas heaters
But such devices can already be “put into the house” by the wave. The level of safety of their operation is much higher, due to a different principle of heat transfer.
Such a device also has a gas burner, and it creates numerous, but very small flames that heat not the surrounding air, but a special ceramic emitter. He, in turn, heating up to a very high temperatures(from 600 to 800 degrees) becomes a powerful source of infrared rays. Well, the advantages of infrared heating are known - thermal energy can be transmitted over considerable distances without dissipating in the air, but, being absorbed by optically opaque objects (including the human body), cause them to heat up. Well, heated objects, in turn, including, for example, walls, floors, ceilings, furniture, etc., will “share” heat, through direct heat transfer, with the air in the room. No fans, that is, the operation of the device is almost completely silent.
Such devices can be connected to mains gas or operate from a gas cylinder. By the way, the design of the case of many models provides for the hidden placement of a standard cylinder in it.
The range of heaters of this type offered for sale is very wide. Moreover, models can differ in size and power, and external design, and the way they are installed in the room.
So, you can buy a very miniature heater, almost almost a desktop version, with a small gas bottle inside. Such a device is suitable for creating a local heating zone, for example, in a place of traditional rest for the owners.
Ceramic heaters can be quite "tiny" - practically desktop For full-fledged space heating, more “monumental” floor-mounted devices are used, similar to those shown in the illustration above.
It is also practiced to install heaters of a similar principle of action on walls and on the ceiling - they have a specific body shape that provides a directed flow infrared heat in a given sector.
Such devices are very effective both for full heating of the room, and for creating zones of "increased comfort". True, ventilation will still have to be provided for them - the combustion of gas, one way or another, requires an influx of oxygen.
The security system, in addition to the protection levels listed above, also provides for the shutdown of the device in the event of its tipping over. That is, the risk of overheating, for example, the floor surface with careless handling or through the fault of naughty children, is minimal.
Video: gas infrared floor heater "Timberk 4200 M1"
Catalytic gas heaters
This type of gas heaters can be safely called the safest in operation. The fact is that there is no open flame at all - the oxidation of gaseous hydrocarbons occurs on a chemical basis, due to a special fiberglass heating element, in which the thinnest platinum coating is used as a catalyst that provides the desired reaction. Be that as it may, it is still a process of "combustion", that is, oxidation, with the corresponding generation of thermal energy.
With such combustion of gas, a minimum amount of oxygen is consumed, which has a positive effect on the atmosphere in the room. The lineup- wide enough, and you can purchase both a heater for full-fledged heating of a quite decent-sized room, and a compact mobile version.
In principle, devices of the catalytic principle of operation could be considered the best option. The only downside is just enough high price on them - but this is due to the peculiarities of the technology of their production.
Stationary gas convectors
If the dacha is supposed to be permanent residence, or trips out of town, even in winter time are regular, then the best option would be to install a stationary convector-type gas heater.
After installation, such heaters become almost indistinguishable from conventional heating convectors. The same characteristic rectangular case, "spread out" on the wall, with slit-like holes at the bottom - for the entry of cold air, and at the top - for the exit of heated air.
But inside, of course, the device is different. There is a combustion chamber (most often - closed type) and a heat exchanger, cast iron or steel, through which flows of heated air pass. Cast iron heat exchangers are considered more durable, but they are heavy and somewhat inert. Steel is lighter, and responds faster to changes in settings or to the operation of a thermostat.
Majority modern models It has a closed combustion chamber, that is, air is supplied from the street, and gas combustion products are directly thrown there, which is extremely convenient. In addition, such devices practically do not pose a fire hazard, since the flame does not come into contact with the air in the room at all. Air supply and exhaust gases are carried out through a coaxial chimney, which is led out through a hole in the wall. This, in principle, predetermines the stationary placement of such devices.
Such devices are not particularly expensive, they work equally well (after appropriate reconfiguration) with both mains and liquefied gas. Fixed installation convectors with correct selection capacities may well serve as the main, that is, the only source of heat at any time of the year.
The disadvantages are small, and even then - very conditional. This is the immobility of the device (as, by the way, of any heating radiator) and the dependence on the presence of the power supply necessary for the operation of the fan of the coaxial chimney.
The execution can be different - from laconic forms to decorative "screens", in which, by the way, the appearance of fire can also be created, for greater picturesqueness.
There are gas fireplaces and open cam combustion, but with them it is somewhat more difficult - you will need to organize a full-fledged chimney. So for summer conditions this is probably not the most convenient option.
Prices for infrared heaters
infrared heater
Outdoor infrared gas heaters
Agree, it is pleasant to spend time in the evening on the street with family or friends. But sometimes cool weather just drives you into rooms where the situation is not at all the same. But there is a solution to this problem!
We are talking about outdoor gas heaters, which are capable of creating and maintaining in a certain radius around them. comfortable atmosphere even in very cold weather. Such devices are usually given a characteristic shape, stylized as street lights or original illuminated columns.
Such heaters work from liquefied gas, the cylinder with which, as a rule, is invisible, as it is hidden at the base of the device. The block with burners and infrared emitters (usually of a ceramic type) is moved upwards, and has a reflector on top - a reflector that directs the heat flow cone-shaped downwards.
However, the shape may be different - for example, the emitter is located vertically, and the distribution of infrared heat is radial in all directions. There are devices and directional action that spread the flow of radiant heat in a certain sector.
Devices are good for everyone - they are able to create a really pleasant atmosphere even in cool weather. Everything is explained simply: the state of comfort does not always depend only on the air temperature - the direct perception of infrared radiation energy also plays a very important role. Remember a frosty sunny day - the heat from the rays of the sun is very well felt by the skin. And in the photographs from the Alpine resorts, people sunbathing in the snow are quite a common occurrence. Exactly the same principle is used here.
Such heaters are very widely used in places of traditional recreation, for example, on open terraces cafes and restaurants. To have such a device at home is very expensive pleasure, and they are found in the life of the average summer resident very rarely. But if any family celebration or a meeting of friends in nature is planned, then, judging by the ads, there is the possibility of renting for an evening or two. This practice is common, and for little money you can very well organize a comfortable outdoor picnic.
"Camping" gas heaters
Heaters of this type have already been partly mentioned above. They can be of various types, but they are united by small dimensions and weight, that is, the devices have exceptional mobility.
In many models, the gas tank is placed inside, very compact, like an aerosol can. Other devices are connected through a hose to a standard small capacity cylinder.
With such a heater it is quite possible to warm up the air in the tent in the evening, to install it not far from you while fishing, if it is cold to sit. They are often used in home workshops if you want to perform this or that work in the winter. And some models have another interesting "option" - a well-thought-out system of stands and brackets allows you to turn the heater into a gas stove, on which you can quickly boil water or cook food.
Prices for camping heaters
camping heater
In a word, even if heating issues are not so acute, having such a small-sized gas appliance- probably never will be superfluous.
What is evaluated when choosing gas heaters for summer cottages
If it becomes necessary to purchase a gas heater for a summer residence, you can be guided by the following criteria when choosing the optimal model:
- First of all, it is necessary to clearly formulate for yourself what the device is being purchased for. Agree that heating a living room, an outbuilding, a garage or a camping “dwelling” are completely different things. The main purpose of various types of devices has already been mentioned, but a few more tips will be appropriate.
If permanent residence is planned at the dacha, then the best choice the gas convector of a stationary installation will become - it will ensure proper savings and constant maintenance of the required microclimate. But in the case when arrivals outside the city are carried out infrequently, it is undesirable to install such a device. Firstly, it can simply be "stealed". And secondly, according to its capabilities, it will not be able to create a comfortable atmosphere in the shortest possible time - with convection heating, this requires a certain time. For such use, it is better to get a ceramic infrared heater. It is easy to bring it in the trunk of a car, and the heating from it in the sector of its action begins to be felt almost immediately - this is a characteristic feature of the radiative propagation of thermal energy.
- The power of the device must be suitable for the intended use. It is useless to expect miracles from a low-power compact portable heater - it will not be able, say, to provide the proper temperature in spacious room. Yes, it is not designed for this.
If the task of replacing the heating system with a heater is not worth it, and the device will be used only in the off-season, the “race” for power will simply be inappropriate. But even in the case when the function of the main source of heat is assigned to the gas appliance, acquiring a model, guided by the principle "the more powerful - the better" - is also not too reasonable approach. The choice must be balanced - there is no point in giving extra money for excess power, which either remains unclaimed, or from which gas overruns and too hot atmosphere in the rooms are likely to be observed.
How to approach the choice of power of any heating device (not just gas) will be described in the appendix to this article.
- often equipped with thermostatic regulators, with which you can set the desired level of temperature in the room. When the set threshold is reached, the gas supply to the main burner stops, and will be resumed only after the temperature drops to a certain lower limit.
It is very convenient, in addition, if the device has the ability to step or smoothly adjust the heating power - either the number of burners involved, or the pressure of the gas supplied to them, changes. Such options significantly reduce the consumption of "blue fuel", increase the durability of the heater, as it will mostly work in a "sparing mode".
- The degree of safety of operation of the heater must be assessed. This has already been mentioned - protection operation, that is, turning off the device in case of overheating, in case of oxygen deficiency, in case of capsizing, gas leakage and other possible emergency situations.
- Dimensions, weight, mobility, that is, the presence of a wheeled trolley or carrying handles, external design - all this is at the discretion of the future owners of the heater.
- It will be a perfect gamble to acquire such equipment from hand or in "not quite clear" outlets. Whatever one may say, gas heaters are devices of increased danger, therefore, they must be factory tested, which is confirmed in the product passport. In addition, the manufacturer's warranty will only be valid if there is a corresponding mark of a specialized store in the documentation of the device.
- gas prices domestic heaters have a very wide spread - from 1 ÷ 3 thousand rubles for compact low-power models, up to 30 thousand or more thousand - for "fancy" devices. Here the financial viability of the buyer comes to the fore.
A brief overview of the top models of household gas heaters
The types of heaters will be considered in the order in which they went above in the article.
| Model name, illustration | Brief description of the model | Approximate price level (summer 2017) |
|---|---|---|
| "Caliber TPG-10" | A typical representative of gas "heat guns", well suited for heating utility rooms. A power of 10 kW makes it possible to heat even very large volumes - a garage or a hangar. Powered by liquefied gas in cylinders. Productivity of the device - up to 500 cubic meters of air per hour at a gas flow rate - up to 0.8 kg / hour. Weight - 5.1 kg. Requires mains power 220 V. Dimensions - 450 x 230 x 300 mm. Overheat protection. The set includes a gas reducer with a hose (there are many complaints about the quality of the hose: hard and short). | 3 000 rub. |
| "Solarogaz GII 2.9" | An excellent solution for creating local heating zones. The infrared ceramic emitter is capable of developing a heating power of up to 2.9 kW, and in the model line, in addition, there are heaters with a power of 2.3 and 3.6 kW. Convenient for working in workshops - you can create the necessary level of comfort, for example, in the workbench area. The absence of an open flame, that is, a high degree of safety in operation. Complete autonomy - no power supply required. Weight - only 1.6 kg with dimensions of 100x220x270 - it is easy to move and take with you to nature if necessary. It is easily transferred to the "gas stove" mode. Gas consumption - no more than 0.24 kg / h. The gearbox is not included. Of the shortcomings noted by users, there is only the absence of an ignition system: the operation has to be carried out manually. | 1 000 rub |
| Timberk TGN 4200 SM1 | Inexpensive gas heater household class with a ceramic infrared emitter. It is quite suitable as the main source of heat in a residential area. Maximum power - 4.2 kW. Three operating modes are available in terms of power level (1.4, 2.8, 4.2 kW) - three gas burners are installed in the device. There is space for a standard 12 liter gas bottle in the back of the case. The kit includes a gas reducer and a connecting hose. A wheeled trolley is provided for easy movement around the room. Dimensions - 575x400x300 mm, weight - 8 kg. There are all necessary levels of protection and protection. Piezo ignition burners. | 4 200 rub. |
| Bartolini Pullover K | Modern model with heating elements in the form of a catalytic panel. The absence of a flame ensures highest level operational safety. Suitable for any premises requiring both additional and main heat source. Fuel - liquefied gas(propane-butane). Heating element power: maximum 2.9 kW, in addition, two more modes are provided - 1.2 and 2.4 kW. Gas consumption - 0.1; 0.2 and 0.3 kg/h - depending on the mode of operation. Dimensions: 780x430x420 mm, weight - 15.3 kg. There is a wheeled trolley for rearranging the device. Place in the housing for the installation of a standard gas cylinder with a capacity of 27 liters. Safety system - shutdown when tilted or overturned, in case of overheating, in case of violation of the flame level, in case of excess carbon dioxide in the room. Piezo ignition, power regulator. The set includes a reducer, clamps for installing and fixing the cylinder, connecting hoses. Complete independence from power supply. Some users consider the somewhat oversized heater to be a disadvantage, that is, its bulkiness at such power indicators. The rest - only positive reviews. | 11 000 rub. |
| Alpine Air NGS-20F | This model is one of the leaders in popularity among wall-mounted gas convectors. Works from mains or liquefied gas. Equipped with a telescopic coaxial chimney through a hole in the wall. Closed combustion chamber. Cast iron heat exchanger. Energy independent automation. Minimum power consumption (18 W), which is consumed only for the operation of the fan. Seven heating power levels with a maximum of 2.2 kW. Built-in thermostat. Dimensions: 630x455x220 mm, weight - 23.5 kg. Protection against overheating and freezing. There are no drawbacks as such, except for the considerable price and some installation difficulties - drilling a hole in the wall is required. | 20 000 rub. |
| Ballu Bogh-15E | One of the most popular outdoor gas heaters, column type, with vertical arrangement burners and emitters. Control can be carried out both directly on the device and from a remote control. The body and fasteners are made of stainless steel. The unique fuel afterburning system ensures 100% gas combustion. The maximum power is 13 kW, which gives a very noticeable heating in open areas even in very cold weather. Regulation of heating levels (at the same time, the intensity of the glow also changes). Gas consumption - from 0.3 to 0.97 kg / h. Dimensions - 847x2410x770 mm with a weight of 40 kg. The gas cylinder with a capacity of 27 liters is hidden in the heater body. The kit includes a gearbox and a set of necessary hoses. All necessary systems of protection and protection. The thermal flask is highly resistant to both mechanical stress and temperature extremes and precipitation. There is a wheeled trolley to ensure the movement of the device around the site. A conditional disadvantage is the high price of the product. | 47 000 rub. |
| Kovea Fireball KH-0710 | A convenient portable model that can be safely called a "tourist option". Quickly warms up the air in the tent, will become indispensable for winter fishing or on the hunt. There are two fixed positions of the device - for heating and for cooking, that is, as a miniature gas stove. It is connected to threaded cylinders of KGF-0230 and KGF-0450 types, and using a special adapter included in the delivery kit - to collet cylinders of KGF-0220 type. Maximum power - 0.9 kW at gas consumption - 0.066 kg / h. Dimensions - 90x180x190 mm, weight - only 565 g. There is a piezo ignition, all the necessary degrees of protection. The device is equipped unique system gas heating, which allows it to be used without problems even in severe frost. Very convenient and compact plastic case, which hides the device in the stowed position. The disadvantages of users conditionally include a somewhat overestimated, in their opinion, cost with rather modest indicators of heating power. | 6 400 rub. |
Video: demonstration of the capabilities and advantages of the Kovea Fire Ball KH-0710 gas heater
Appendix: How to correctly determine the required heat output for full-fledged space heating
So, if the heater is considered as the main source of heat for heating the room in winter, then you should pay closer attention to its power.
Prices for gas stoves KOVEA
Gas hob KOVEA
Often they operate with the ratio: 1 kW of thermal energy per 10 m² of room area with an average ceiling height of 2.5 ÷ 2.7 m. You can follow this simplified path, but a serious mistake in one direction or another is not ruled out. The point is that the scores required power depend not only on the size of the room - there are many other criteria related both to the location of the house (for example, the climatic conditions of the region of residence), and to the characteristics of a particular room. Therefore, it would be advisable to carry out a more accurate calculation, taking into account these factors. Moreover, such calculations will not take much time - for this we suggest using a special calculator.
Below, under the calculator, brief explanations will be given on working with them.
As soon as these products are not called - starting from fire heaters, heat guns, just burners and further: gas heaters, gas furnaces, hot (warm) air generators, air heat generators. The most common (correct) name is still gas air heaters and, when viewed from the side of supply units, gas heating sections. This material is a brief overview of the topic for HVAC professionals who are new to gas-fired air heaters.
The main focus is on supply units with gas air heating.
Direct fired gas air heaters
direct heating- this is the heating of air directly by the flame of the burner. Direct heating devices (also called mixing-type air heaters) do not have combustion chambers or heat exchangers.
Modern combustion systems allow highly efficient combustion of natural gas, however, when designing, it is necessary to calculate the dilution of hazards entering the room with combustion products below the MPC. These units are especially effective at high air exchange rates, when the level of hazards emitted indoors significantly exceeds the level of combustion products from direct-heated gas air heaters: foundries, welding shops, etc.
Thermal power range - 40-1500 (2000) kW.
Due to the lower metal consumption, mixing gas air heaters are cheaper than recuperative ones. Large range of power modulation. The absence of a chimney, the combustion products are immediately mixed with the heated air - there is no need to think about the condensate of combustion products when working with negative outdoor air temperatures.
Widely distributed in the USA, Canada, Great Britain. There are manufacturers in France, Germany and Holland. In Russia, they are still relatively rarely used, although we also have several domestic manufacturers.
Indirect gas air heaters (recuperative)
With indirect heating, the air supplied inside the unit by means of a fan is heated by passing around the combustion chamber and through the heat exchanger. The heated air is then discharged either directly into the room or supplied through a duct system. The products of combustion are removed through the chimney.
Indirect heating devices, in turn, are divided into air heaters with a built-in atmospheric burner (with a tubular heat exchanger) (Fig. 2, 3, 4) and heat exchange modules with an additional fan (inflatable, blast) burner.
Schematic diagram of the units of the first type: at the inlet is an atmospheric burner, i.e., operating under atmospheric pressure and consisting, as a rule, of several nozzles / nozzles (similar to those on any home gas stove). Further, after the tubular (plate) heat exchanger at the outlet, there is a smoke exhaust fan, thanks to which the combustion products pass through the heat exchanger.
Advantages- simple design, which means competitive price.
Flaws:
small range of thermal power: 15-150 (200) kW. To provide more thermal power, these heat exchange modules are installed in series and / or in parallel, which leads to an increase in the cost of this solution;
difficulties, if necessary, to work in the mode of condensation of combustion products.
Schematic diagram of an air heater with a fan burner: a fan burner (i.e. with a fan) is installed in the combustion chamber of the heat exchange module. Due to the pressure created by the burner, the combustion products pass through the combustion chamber and heat exchange pipes (channels).
Thermal power range - 40-1000 (1200) kW. A more expensive solution compared to atmospheric burners corresponding in terms of thermal power, but on the other hand a larger power range, it is easier to solve the issue of the formation of condensate of combustion products - the possibility of using diesel burners.
Intermediate conclusion: at the moment, due to the small range of thermal power, it is advisable to use gas air heaters with an atmospheric burner for small air handling units or monoblock (roof top) air conditioners. For large central air conditioners and air handling units, gas air heaters (heat exchange modules) with an additional fan burner are more competitive. Further, in more detail about the version of the gas heating sections, consisting of a heat exchange module (air heater) and a fan (inflatable) burner.
Materials used to manufacture the heat exchange module
The heat exchange module for the fan burner conditionally consists of a combustion chamber and then a heat exchanger.
Most manufacturers use the following materials:
- The combustion chamber is made of stainless steel AISI 430 (GOST - 12X17) when working with air heated to a maximum of 120 ° C. For combustion chambers and various connections when air is heated to temperatures from 120 ° to 280/300 ° C and at a degree of air heating (dT) of more than 80 ° C, heat-resistant stainless steel AISI 310 (GOST - 20X23 H18) is used. Sometimes at different pressures and air temperatures, different thicknesses of steel are used for combustion chambers.
- If condensation of combustion products inside the heat exchange module is excluded, the heat exchanger pipes can be made of carbon steel, for example, steel S235JR (GOST - St3 sp) or aluminized steel. In case of possible condensation of combustion products in the heat exchanger, it is necessary to purchase an air heater with a heat exchanger made of acid-resistant stainless steel: AISI 316 (GOST - 08X17 H13 M2), AISI 441 (no analogue in GOST according to DIN X2CrTiNb18), AISI 304 (GOST - 08X18 H10) and extreme case AISI 409 (no analogue in GOST according to DIN X2CrTi12), in which condensate drain must be provided.
The phenomenon of formation of condensate of combustion products directly in the heat exchange module itself is due to increased cooling of the latter. At a constant nominal air flow, this can be caused by a low supply air temperature or a decrease in the heat output of the burner below 60-65% of the nominal when operating on 100% recirculated air.
One of the ways to reduce the amount of flue gas condensate inside the heat exchange module is to organize a bypass line that operates depending on the temperature of the flue products in the chimney.
Fuel
The fuel for gas air heaters can be, firstly, liquefied petroleum or hydrocarbon gases (LHG): propane and butane. They are also called heavy hydrocarbons because, unlike natural gas, they are heavier than air. In case of leaks, they are more dangerous, since they do not evaporate, but spread along the floor, filling niches. It is a mixture of propane and butane that is sold for household needs in cylinders.
Liquefied carbon gases can be used by almost any burner when the nozzle is changed and reconfigured accordingly. However, due to the fact that LPG is not much cheaper than diesel fuel, this is a very rare option for industrial facilities.
Secondly, the fuel for the burners can be liquefied natural gas (LNG), i.e. liquefied methane. It is cheaper than LPG, but in Russia, with its developed network of gas pipelines, its use is exotic.
Finally, the third and most common option: natural gas is methane.
Gas pipelines for natural gas are divided into networks of low (up to 0.05 kgf/cm2), medium (from 0.05 to 3 kgf/cm2) and high (from 3 kgf/cm2) pressure.
Atmospheric burners and premix burners are designed for low - 20 mbar - inlet gas pressure; when connecting them to a gas pipeline, as a rule, additional reduction gears must be used.
The inlet pressure of fan burners (fig. 7) can be different depending on the gas train (multiblock) used (fig. 7). The lower limit depends on the characteristics of the ramp and the heat exchange module. The upper threshold for burners is usually fixed: 100, 360 or 500 mbar. Thus fan burners can operate in networks with low and medium pressure.
It should be said that diesel burners can also be included in the composition of gas heat generators. In addition, there are combined burners that operate on both gas and diesel fuel. But such a solution is quite expensive, so if necessary, a diesel burner is installed at the facilities first, and then a gas burner is bought.
When using diesel burners, operation in the mode of condensation of combustion products should be avoided.
Gas and diesel fan burners, automation
Depending on the task of the burner, there can be:
Single-stage - operate at one fixed power;
Two-stage - operate at two pre-set power values (low and high);
Modulating - the power of its work can smoothly vary from min to max values.
The selection of the burner is carried out according to the power of the heat generator and the back pressure created in the combustion chamber; in addition, the length of the burner nozzle must be taken into account. The length of the burner nozzle must be within the range specified by the manufacturer of the heat exchange modules.
Air heaters (heat exchange modules) are equipped with a block of thermostats that provide the internal logic of operation and safety of the heating section, but do not control the temperature in the heated and/or ventilated room. Automation for controlling the temperature in the room (in the air duct) is a separate issue, depending on the task and the burner used.
Features of placement of air handling units with gas heating
The placement of air handling units with gas heating inside heated rooms is regulated by the document NPB 252-98 “Heat generating devices operating on various types of fuel. Fire safety requirements.
If the air heater is placed in the ventilation chamber (Fig. 9), then here you should see the norms of SNiP II 35-76 * "Boiler installations".
The easiest option in terms of approvals and regulatory documents is outdoor placement. At the same time, do not forget about outdoor service.
Standard European outdoor air heat generators (air heaters) are designed for operation at temperatures down to -15 (20) °С. Automatic burner allows it to turn on at a temperature not lower than -15 °C. Usually, the burner and the electrical panel are simply covered from above with a casing of sandwich panels (
In most cases, this is enough, since the burner heats both itself and the surrounding space during operation. There are examples when these measures allow the burner to serve normally in Russian conditions for more than one year.
On fig. 11 you can see an example of a more thorough execution of the gas air heater section: the section with the burner is insulated on all sides, grilles are made for ventilation of the section.
In regions where the temperature drops below -30 °C in winter, the burner section must be heated. Most often, an additional electric heater is installed for this, sometimes warm air is supplied from a heated room or a ventilation duct.
The feasibility of using gas air heaters and the situation on the market
In general, a gas air heater (supply unit with a gas heating section) is more expensive in capital costs than a similar plant with water (electric) heating, but, on the other hand, a gas air heater is always cheaper than a boiler room + water supply unit of the same heat output.
Accordingly, gas air heaters are the most competitive when there is no parallel large boiler house (heating main), and a small boiler house is used, for example, for some small ABK (office center) and / or hot water supply
That is, on the basis of gas air heaters, a single system of air heating and ventilation is being built: a production facility, a warehouse, a shopping mall, a cinema or a gym. As a rule, in this case, in supply units (air heaters), mixing chambers are provided for simultaneous operation with supply and recirculated air. It is possible to heat and/or ventilate particularly fire hazardous premises by supplying superheated 100% supply air, but such installations are more expensive and complex. Initially, the main purpose of gas air heaters is air heating.
A gas air heater in the mode of a clean supply unit, which solves only the problem of ventilation, is used for rooms heated by gas infrared heaters (radiant heating) or hinged gas air heaters (gas air coolers).
Currently, there are several types of units with gas air heating on the market. The first type is floor air heat generators (gas air heaters). Such devices usually consist only of a heat exchange module and a fan section. The second is monoblock rooftop air conditioners (in English they are called Roof Top), which, in addition to the cooling section, can have a heating section on water, electricity or gas. Finally, the third - custom-made supply and air handling units with gas heating section.
It is clear that the use of standard solutions means lower capital costs, but sometimes the only acceptable option is custom-made units, equipped, for example, with a recovery section, humidification and other additional equipment.
We consider this topic open. It is better to clarify some nuances for a specific task by contacting a specialized specialist.
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Recuperative air heater with atmospheric burner |
Gas heating section with atmospheric burner |
|
Air heater with fan burner |
Heating section with bypass |
 Fan burner with gas train |
An example of an object with gas supply units |
|
Execution of section under a torch at street placement |
A gas air heater is a device designed to heat the air in a room. Today, this device has been widely used in livestock and poultry factories that require a certain temperature regime, however, today they are often used in residential buildings. The second unofficial name of this heating device is a gas stove. It is worth noting that the air heater is powered by natural gas, which gives it the advantage of minimal inertia, from which the heat that has arisen from the burnt gas quickly spreads throughout the room, thereby heating the room in a short time. The rate of heating in a room is also affected by the power of the gas heat pump.
The air heater consists of several parts: a housing, a heat exchanger, a heat exchanger, a multi-speed fan and a smoke exhaust fan, a gas valve, and a heat and sound insulator. The principle of operation is very simple.
Air is supplied to the heat exchanger through the fan, then, thanks to gas burner heats up and enters the heat exchanger, and only then enters the room and heats the room. Although the device generates carbon monoxide, it is not dangerous, because this gas leaves through a special chimney.
The choice of such an air heater today is not an easy task, because on the market heating technology there is a wide variety of models gas ovens, differing in the principle of operation, functions and capacities.
First of all, you need to take into account the area of \u200b\u200bthe room. When choosing an air heater for large rooms, you should pay attention to devices with a power of 750-2500 kW, and for a smaller area, a power of less than 750 kW is suitable.
It is also necessary to take into account the presence of gaps in doors, windows and walls, since there is a high probability of heat loss through them, which is directly related to saving money.
By the way, there are 2 classes of gas stoves, premium and economy, such air heaters differ in price and brand of the manufacturer. There are also economical thermal furnaces that can reduce up to 75% of the energy expended when heating a room. It is worth paying attention to the sound insulation of such an air heater, as excessive noise can bring discomfort.
The most efficient and economical of all air heating systems is just gas. Because due to the high efficiency thermal device, due to the low gas waste rate, the cash costs of installing such a system will pay off quickly. Even the absence of a central gas supply will not interfere with its use.
In summary, it should also be noted that gas air heaters are simple designs, and most importantly, reliable, which is so necessary on cold winter days in many industrial workshops and residential premises. By purchasing a gas air heater, you can confidently trust him not only with your business, but also with your home.
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