Heat guns: an overview of the market range and tips for choosing a specific unit

Conventional heaters are not able to provide quick heating of air in a large room to the required temperature. Heat guns can easily cope with this task, various models of which are sold on the Russian market. You can feel the desired effect during the operation of this equipment a few minutes after it is turned on at full power, which is several times higher than that of household heating appliances.

Compact-sized mobile units are installed in warehouses, in industrial workshops, in greenhouses, at construction sites, etc. Thanks to the operation of heat guns, a comfortable temperature level is provided in open areas in separate working areas. After all, these devices are able to purposefully supply warm air in large volumes. The use of heat guns accelerates the installation of concrete screeds due to the saving of time required for complete drying of the coating. Also, this equipment is actively involved in the installation of suspended ceilings. Manufacturers produce a variety of models of heat guns that can run on electricity, gas or waste oil, as well as diesel fuel.

Option # 1 - electric heat guns

In appearance, most models of electric heat guns resemble a pipe made of sheet metal. Thanks to this design feature, the equipment received such a resounding name. The metal case is painted with special powder paints that are resistant to abrasion. Heat guns are equipped with special slides that facilitate the movement of portable equipment, and also serve as a stable and reliable stand for him.

In a tubular housing, manufacturers install:

• spirals that can heat up to very high temperatures, which is unsafe;
• ceramic heating elements that are safe during operation and more efficient due to high efficiency, but expensive in price;
• Heating elements superior to spirals in terms of efficiency and safety, but inferior in accordance with these criteria to ceramic heating elements.

In a heat gun, the air passing through special heating elements is forced by powerful fans. This simple principle of operation is laid down in other types of heating equipment, inferior to heat guns in power and productivity.

For ease of movement, the manufacturer equipped the Sturm FH15040 electric heat gun with wheels and a handle made of tubular metal

If the room is not very large, then you can use an alternative option - an electric fan heater.You can collect it yourself at home. More about this in our material:https://aquatech.tomathouse.com/en/otoplenie/radiatory/teploventilyator-svoimi-rukami.html.

The switches, located most often on the upper part of the body, are used to control the operation of the gun. The first switch allows you to set the desired mode of operation. Most models can operate in ventilation mode, heating at full and half power. The second switch is used to control the thermostat.

Electric models of heat guns are most popular with consumers, because their operation has several advantages. The absence of exhaust emissions allows the use of equipment indoors in the presence of a large number of people. The pluses also include:

• compactness of electric models, achieved due to the lack of combustion chambers and fuel tanks in the design;
• silent operation, which is also important for human health;
• lack of need for maintenance;
• one-year warranty for the purchase of a heat gun; long-term operation;
• the consent of the regulatory authorities for the installation of equipment in the room is not required.

The disadvantages of the operation of electric heat guns include their dependence on the magnitude of the voltage in the mains. The equipment is connected to an electrical network rated for a voltage of 380 V.

Option # 2 - LPG models

The operation of thermal gas guns is carried out in open areas and in well-ventilated non-residential premises. Propane gas is used as fuel, which is delivered to the cannon through the main gas pipeline or from cylinders. The cost of the installation on the main gas is much cheaper. When you turn off the gas supply and disconnect the flexible hose that supplies the "blue" fuel, the gun turns from a heating device into a fan.

The unit works without smoke and odor. Powerful models are able to heat objects, the volume of which reaches 250 cubic meters. meters. The efficiency of this equipment is almost 100%, since fuel is fully used during operation. It does not cause problems during transportation and maintenance. With the help of the regulator, the unit’s thermal capacity is increased or decreased within the limits specified by the manufacturer in the gas equipment manual.

The power of this gas heat gun Sturm GN-9130, equipped with a regulator and a meter and a half flexible gas hose, is 30 kW

The models provide for protection against overheating in the form of a built-in thermostat, which turns on when the allowable temperature level is exceeded. After turning on the thermostat, the gas supply to the unit automatically stops. The shells of gas guns are coated with special heat-resistant enamel, which does not contain lead. Enamel coating protects the product from overheating.

Important! Gas cannons are not allowed to heat basements, as well as stables and livestock farms.

The advantages of using gas heat guns include the affordable cost of equipment, as well as cost savings in the event of its operation from the main gas. At the same time, you can not ignore the minuses. Gas equipment is installed only with the permission of services that monitor the safety of the connection and operation of explosive devices. During the operation of the gas gun, oxygen burns out, therefore, increased requirements are imposed on the forced ventilation of the room.

Liquefied gas is used in heating systems of private houses. You can find out how they are arranged and how they work from our article:https://aquatech.tomathouse.com/en/gazosnabzhenie/avtonomnoe-gazosnabzhenie-chastnogo-doma.html.

Option # 3 - diesel units

The design of diesel heat guns is very simple. The main parts of the product are:

• fuel tank;
• the combustion chamber;
• burner;
• fan.

Manufacturers supply some models with wheels. The autonomous mode of operation of the unit is ensured by a timer, thermostat and flame control system. The supply of diesel fuel to the nozzle is carried out by a pump or compressor. After fuel is injected from the nozzle into the combustion chamber, it ignites. The fan blows cold air into the gun body, which is heated from contact with the walls of the combustion chambers. High power efficiency models are available from 10 to 100 kW. It is not required to obtain permission from services with supervisory authority to install this equipment.

Diesel guns are divided into two groups according to the type of heating. In direct-heating heaters, the combustion products are taken directly into the air, therefore it is recommended to use them in warehouses and in well-ventilated rooms not intended for human habitation.

MasterYard brand direct-heating diesel heat gun MH 37D is used in rooms where there is no dust or flammable fumes in the air

In the design of indirect heat guns, a special tube is provided for the output of combustion products into the chimney. Such installations can be used in rooms with people. However, it is necessary to replenish oxygen reserves by periodically ventilating the room. They are used for drying building materials and for heating unheated rooms, provided that they have ventilation systems.

In terms of heating power, the second group of diesel guns is inferior to the first. But surpasses models with direct heating for operational safety. Modern models are equipped with reliable protection against overheating and an electronic flame stabilization system.

The use of a diesel heat gun of indirect heating is possible with an exhaust system through the chimney and constant ventilation of the room

Option # 4 - oil-powered devices

The operation of heat guns in waste oil is a profitable and affordable option for heating non-residential industrial and industrial premises. As a fuel for this type of heating equipment, you can use any type of waste oil, the cost of which is lower than any other fuel. Suitable motor and hydraulic oils, as well as mixtures thereof. It is forbidden to fill transformer oils, as well as oils, whose viscosity exceeds 90 units according to S.A.E.

The operation of heat guns operating on waste oil is based on the principle of free combustion of fuel in the combustion cup. Oil is supplied in drops by a rotary pump to a heated burner bowl. Combustion of fuel occurs, accompanied by heat transfer. As a result of this process, the temperature of the combustion cup is maintained. The heat exchanger is heated by warm air and exhaust gases passing through the chimney. The exhaust gas is carried out outside the premises.

Master WA 33 B - model of a stationary heat gun using waste oil designed for efficient heating of industrial premises

Through the axial fan, fresh air is supplied to maintain the combustion process. Another fan blows the heated combustion chamber, as well as the heat exchanger. Thus, a powerful stream of warm air is created. The heating efficiency can be improved due to the emission of heat by the combustion chamber. The device provides for thermostats and an autonomous gun control system. Models of heat guns operating on waste oil have one hundred percent efficiency. When used, the air in the room remains clean. No smell and no soot.

It is recommended to use heat guns in mining at industrial facilities and in agriculture. Using these installations, it is possible to provide heating for warehouses, car services, repair boxes, garages.

You can make a simple working furnace yourself. You will find step-by-step instructions with photos in our next article:https://aquatech.tomathouse.com/en/gazosnabzhenie/avtonomnoe-gazosnabzhenie-chastnogo-doma.html

Power calculations to select a specific model

To select equipment of suitable capacity, it is necessary to know the volume (V) of the room in need of heating. This value is calculated very simply. The length, width and height of the room are measured. All three values ​​are multiplied on the calculator. It is also important to know the difference (∆T) between the value of the temperature created inside the room and the temperature of the surrounding air outside. For example, if the window is -30 degrees, and the room should be +10 degrees, then the temperature difference is 40 degrees. In addition to these two parameters, one must also choose the heat loss coefficient (K), the value of which depends on the degree of insulation of the object:

• 3.0-4.0 (for objects without thermal insulation);
• 2.0-2.9 (for structures, the design of which provides a small degree of thermal insulation);
• 1.0-1.9 (the average level of thermal insulation implies the presence of double brickwork, a small number of windows, as well as a roof with a standard roof);
• 0.6-0.9 (for well insulated objects).

Three values ​​are substituted into the formula: Qt (kW / h) = V x ∆T x K / 860 and find the minimum power of the heat gun. Next, determine the most profitable type of fuel, taking into account all the advantages and disadvantages of its use.