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Not always garages, workshops and technical rooms have central heating. However, working conditions require comfortable conditions. For rapid space heating, mobile devices, such as gas heat guns, are optimal.
Not every model allows you to warm up even a small room in short lines. The modern market offers a huge selection of mobile guns, and it is difficult to understand which heat gun is better. The choice of installation is related to certain characteristics, such as the volume of the room and the power of the device. So, a gas heat gun Zubr with a power of 10000 W will be able to heat a spacious garage 6 by 10 meters, but it will not cope with heating a large warehouse. Therefore, when choosing a device, it is important to take into account all the parameters of the room.
The principle of operation of a gas heat gun
The structure of a heat gun is very similar to a simple heater. It consists of a heating element, ventilation blades and a housing. An important part of the device is the fan. It must be very powerful in order to heat the entire room in a short time.
Cold air enters the gun due to the operation of the fan and enters the heating element. An already heated air stream is supplied from the device.
Device Specifications
One of the main advantages of most heat guns is mobility. You can take them with you to the workshop or garage. The average weight of installations is 3-7 kg.
Most often, gas installations have a cylindrical shape and fasteners. The body of the device can be directed at the desired angle, thereby heating certain areas of the room.
Cannons use propane, natural gas or butane as fuel. Gas is supplied through the slots of the burner to the combustion chamber. It has a piezo ignition function, which makes the device safe to use. When the fuel is burned, the heat exchanger is heated, to which air is supplied. After passing through the hot walls of the heater, warm air exits the device. Due to the fact that the unit has a fan, it needs access to the mains. But the gun consumes a little energy (from 10 to 200 watts).
The advantage of gas guns is that they have high power with low fuel consumption. However, they have a significant drawback – a high level of danger. In the process of heating the room, oxygen burns out. This negatively affects the condition of people. Therefore, guns with gas fuel cannot be used in rooms with faulty ventilation. Because of this feature, the device is not recommended for installation in living rooms. They are optimal for large technical premises such as warehouses, construction sites or large garages.
Types of heat guns
All guns consist of a body, a heater and a fan. Only the materials of the device itself and the type of power supply differ. The housing of the unit has special openings for the entry of cold air. There are both rectangular and cylindrical guns. Powerful devices with a lot of weight are equipped with a stand (bed) and wheels for more convenient transportation and movement.
The heating element of the device is a heating element, a spiral or a combustion chamber. Thanks to them, the room is heated. The heater is powered by different types of energy carriers, depending on their type of gun, there are:
- gas;
- electric;
- diesel;
- solid fuel.
There are also efficient infrared installations, but they consume a lot of energy.
How to choose a heat gas gun
When choosing a device, it is important to remember about power. If you do not know how to choose the right gas heat gun, use the instructions below.
To calculate the power of the gun, it is necessary to measure the parameters of the room. To do this, measure the height, length and width of the room in which the gun will be installed. All three indicators must be multiplied – this will be the volume of the room. The resulting number is multiplied by the coefficient of thermal insulation. For rooms with a low level of insulation, the coefficient is 4, with a high level – 1. The most common value is 2-3 units.
The resulting number must be multiplied by another coefficient – the difference between the internal and external temperatures of the room. To do this, take the average temperature on the street in the winter season (for Moscow, the indicator is -9˚). For the internal temperature, take the one that is necessary for comfortable work. So for storage facilities it is +15, and for a workshop +20. The difference between the external and internal temperature will be the coefficient. So, the calculation of the gun power for a large garage 3 * 6 * 10 m will look like this:
- The volume is calculated: 3×6×10=180;
- We multiply the resulting value by the coefficient of thermal insulation (for example, the room has an average degree of thermal insulation of 2). 180×2=360;
- For a garage in which a person not only parks the car, but also does repairs and other work for several hours a day, the optimum temperature is 17˚. At the same time, the temperature outside in the winter season is -9˚ (-9-17=-26). Thus, the temperature difference coefficient will be 26. 360×26=9360.
This value shows the amount of heat needed for the room, kcal is used to designate it. However, the power of heat guns is measured in kW or W. We divide the resulting indicator 9360 by a constant value of 860 and get the power of the gun needed to heat this room. So, in the calculations, the value of 10,8 kW comes out. It is this power that a gun for heating an average garage should have.
When buying a model, pay attention to the quality of the case and the presence of additional functions. It is desirable that the device be equipped with gas regulation and fan and air nozzle protection. If the unit will be used all year round, choose a model with a power adjustment function.
Popular and powerful models of heat guns
If you want the unit you have chosen to last for many years, take a look at the models popular with users:
- Gas heat gun Master blp 17 m. The device from the American manufacturer of professional heating equipment has an average power of 16 kW. The unit has an overheating protection function, which will protect the premises and the owner during long work. In addition, the inlet nozzle of the gun has a protective grill that prevents foreign objects from entering the device. Gun Master has a high quality score among buyers.
- Gas heat gun Ballu BHG-20m. The installation is more powerful than the previous one – 17 kW. The device also has a protective mechanism against overheating. When all the fuel is burned, the gun turns off by itself. The metal case is coated with an anti-corrosion compound, so the unit can be used in rooms with high humidity. The gas supply hose is reinforced to prevent kinking. According to reviews, the power cord is too short for the gun. In general, the Ballu gas gun is a good unit for construction work and heating of medium-sized premises.
- Gas heat gun Zubr Expert 15. This -made device is equipped not only with piezo ignition, but also with the function of adjusting the gas supply. This allows you to change the degree of heating of the room when the temperature outside changes. The device is optimal for heating medium-sized rooms. Its working power is 15 kW, and its weight is 8 kg. For construction work or heating small rooms, bison 10 is suitable, it has less weight and power.
The average cost of the above models is 5-7 thousand rubles. These guns are suitable for both private and industrial use. They are indispensable at construction sites, when decorating premises.
When choosing a gas heat gun, do not chase for high power. Even a couple of extra kilowatts will make the device more expensive by 1-3 thousand rubles. In addition, more powerful devices consume more fuel, which will lead to unnecessary expenses. When choosing a gun, be guided, first of all, by the volume of the room.
