Choosing a heat gun for the garage. Features of choosing and installing a heat gun in the garage

home

Scud

The garage not only serves as a shelter for the car from cold and precipitation, it is also a workshop where minor car repairs are carried out. Repairing it is not so difficult in the warm season, however, when the frost season arrives, working in the garage turns into an ordeal.

The conclusion suggests itself: the garage needs to be heated. But what if there are no communications other than electricity? All that remains is to rely on autonomous heating systems or devices powered by this type of energy.

Here, for example, is a heat gun. This is a unit capable of heating the air in a room in a very short period of time. Then you will need to maintain the temperature, and this will be easier to do, the more thoroughly the garage is insulated.

An additional advantage of insulation is the protection of metal from corrosion. Especially if the garage is heated from the inside: heated surfaces in contact with cold air become covered with condensation - moisture, which causes oxidation and destruction of the metal. This applies equally to both garage structures and the car itself.

Insulation of the garage

The first rule of heating is insulation, but normative and with mandatory device ventilation. The standard insulation of a garage is considered to be such that in any frost the air temperature in it will not be lower than + 5o C. The temperature should not be higher, since the car, leaving the warm place for the cold in winter, will be covered with frost, which will have a destructive effect on the metal.

Ventilation is necessary for air circulation, since the garage is a place where carbon monoxide and other gases harmful to health are released. Especially if it is supposed to be heated by a mechanism that, when operating, also emits fuel combustion products.

When choosing insulation and sheathing for insulating a garage, you need to remember about its increased fire hazard: storage of fuels and lubricants and the possibility of sparking mechanisms. Based on this, materials should be chosen that are non-flammable or self-extinguishing.

If the garage is not permanent, then you can line its walls from the inside with a layer of polystyrene foam 8-10 cm thick (you should use PBS-S, which contains a fire retardant that prevents combustion). Instead of polystyrene foam, you can use liquid or more cheap analogue- penoizol, which provides a seamless coating. Polyurethane foam has a lower thermal conductivity coefficient, but it is twice as expensive as polystyrene foam.

Also used basalt wool, but be sure to protect it from moisture.

The heat insulator is mounted on a sheathing made of wooden beams or aluminum profiles, the casing is then aimed at it. The latter can be made from non-flammable plastic panels or corrugated aluminum sheets.

Ceiling insulation is arranged in a similar way, but you can make a false ceiling and insulate it, and there will be additional attic space between it and the roof.

Conditions for choosing a heat gun

When the garage is insulated, you can start heating it. Heat gun is capable of warming up the air in a room in a short time and maintaining its temperature in a selected range.

The choice of gun is made based on the volume of the room, the temperature in winter time year, the insulation coefficient, which depends on the thermal conductivity of the garage construction materials and the thickness of the layers of each of them. In addition, the frequency and intensity of use of the gun and the presence of communications in the room are taken into account.

The larger the garage, the colder the winter and the “thinner” the walls, the more power the heating device is needed. The more often and for more long time the garage needs heating, the more reliable and efficient the unit is needed.

The presence of electrical wiring does not at all guarantee the possibility of heating using an electric heat gun. A heat gun for a garage with a power of 1-3 kW, which can be provided by single-core wiring with a voltage of 220 V, is not able to heat even a typical garage space measuring 3x6x2.5 m. For models with a power of 5-10-20 kW, three-wire wiring with voltage 380 V. This means that the wiring needs to be changed: find out the capabilities of the nearest distribution zone, order a project, lay a cable. And electricity is the most expensive type of fuel today.

Types of heat guns

Heat guns operate on the principle of a fan heater and come in three types, differing in the energy resource used for heating and, as a result, in design.

1. An electric heat gun consists of a heating element that warms the air and a fan that pumps it into the room; its productivity ranges from 180 to 800 m3/hour or more. Experience proves that heat guns with a power of 1-2 kW are ineffective. The power should be from 4-5 kW, but for such a gun, as mentioned above, you need the appropriate three-wire wiring with a voltage of 380 V.

The absence of stationary electricity can be replaced by a gasoline generator that produces electricity. True, devices. generating electricity voltages up to 400 V are 5-6 times more expensive than those that provide current voltages up to 220 V.

2. A diesel heat gun is the most economical device to use, but it is quite expensive (from $1200 to $5000 and above). Diesel guns By design they are divided into direct and indirect heating units. In the first case, all combustion products enter the room. In the second, the device is equipped with a pipe for removing burnt fuel to the outside. But, however, the gun takes air from the room to maintain combustion, so the latter needs periodic ventilation. A diesel heat gun is a powerful unit, so it makes sense to use it for large rooms.

3. A gas heat gun for the garage is perhaps the most economical option. Firstly, the unit itself is relatively inexpensive, and secondly, and importantly, it runs on the cheapest type of fuel - gas. One liter of liquefied gas is enough, on average, for an hour of cannon operation (a cylinder is enough for 4-5 days of work in one and a half shifts).

But a gas gun has a significant drawback: it burns air and releases combustion products directly into the room. This makes it difficult to stay in it without constant ventilation, which, in turn, cools it down again.

The way out of the situation is seen in the following: if heating the garage is constantly needed, albeit occasionally, then it is worth purchasing two guns (possibly in cooperation with neighbors) - gas and diesel. The first is capable of completely warming up a garage in 15 minutes. Then the time comes for the second one - it maintains the required temperature in the room, removing the products of fuel combustion outside. If air flow was arranged from the street, then such a gun could operate without special ventilation for as long as desired.

The gun consists of heating elements, a fan, a thermostat and, of course, a housing. Powerful fan creates an air flow that passes through the heating elements and comes out already warm. A garage can not only be used to store a car and other things, it can also be used for car repairs. For year-round work in the garage, it is not bad to have heating; some install electric heaters, but it happens that there is not enough power.

Choosing a gas gun for the garage

In some garages, the electrical wiring may not be able to withstand the simultaneous connection of an electric heater and, for example, some kind of power tool, and as a result, the overload protection will be triggered.

To create heat, you can use autonomous system heating using, for example, a gas gun.

Using a gas gun for a garage allows you to quickly warm up the garage, provided that its power is selected taking into account its area. Excess power will waste gas, and too little power will not be able to properly warm the room. Typically, 1 kilowatt is capable of heating 10 m2 of area.

Heating is more economical thanks to the use of gas; it is enough to install 1 large cylinder, which usually lasts for quite a long time. Typically, 0.5 liters of gas are wasted with a gas gun power of 10–12 kW. And if you use a valve to reduce the gas supply, it may last for a longer time.

There are also negative point using this model:

The gas burns oxygen in the room quite intensively;
Besides, long burning will contribute to the accumulation of combustion products, which can lead to carbon monoxide poisoning;
Should be in the garage good ventilation or, the gas gun should be used periodically with regular ventilation of the garage.

The very first start of the gas gun should be checked to ensure that all elements are connected thoroughly to avoid gas leakage. The first start is best done outside or with the garage door open, this is necessary so that the factory grease burns out.

The best heat guns for the garage

If you have the necessary communications, in particular electricity, you can use electric power. Although they do not heat the room as quickly as gas ones, they are able to maintain the set temperature for a long time.

But, at the same time, electric guns have limited use, as many electrical grids in garage co-ops may not be able to handle the additional load, which could result in intermittent power outages.

Also, the use of such models consumes quite a lot of electricity, which can lead to additional expenses. Diesel guns use, as their name suggests, diesel fuel to operate.

These heat guns:

They are distinguished by high efficiency;
At the same time, they are quite economical;
They are easy to use.

When using a gun on diesel fuel, you must use supply and exhaust ventilation, if there is one, if not, then it is better to do it in order not to be poisoned by combustion products. You can use an indirectly heated diesel gun; such options are effective because, due to their design, the fuel burns completely and the heat passes through a special heat exchanger. Residual products of combustion through special pipe are brought out.

Some people use combined heating heating systems, for example, for rapid heating, use gas heaters, and for constant heating, gasoline heat guns or solar powered ones. For heat guns to be effective, it is necessary to first insulate the garage so that the heat does not escape outside. To properly heat the garage, you should also select a heat gun according to the area of the room.

Which heat gun to choose for the garage

A garage is an uninhabited room, but, nevertheless, people are present in it, so you should select a heater for the garage, not only based on the area and, as a consequence, the certain power of the heat gun for heating, but also on the safety of people.

For example, using a heat gun with direct combustion of fuel (gas, diesel) without adequate ventilation can lead to dire consequences.

To avoid negative consequences, it is better to choose a heat gun that runs on fuel with an additional system for removing combustion products to the street. If the garage has good wiring that can withstand a certain load, then it is best to purchase an eclectic heat gun or fan heater to heat the garage.

Peculiarities:

Most of the models sold in stores are intended for installation on the floor, but, nevertheless, there are models that can be installed on some elevation or broadcast on the wall.
If the garage space is large, then you can choose floor-standing models, but if not, then you should take a closer look at more compact models.
Second important point when choosing the heat of a gun is its power so that it supports optimal temperature in room.
It is believed that for every 10 m2 a power of 1 kW is needed. That is, simply put, for an average static garage, a heat gun power of 3–5 kW is sufficient, provided that it is insulated.

Some people use combined garage heating, for rapid heating with advising ventilation, use gas heat a gun or one running on diesel fuel, and to maintain a constant temperature, other models, for example, electric ones.

Tips: which heat gun is better, gas or diesel

The choice of such a machine depends on why a heat gun is needed: to quickly warm up a room in a short time, or to maintain a certain temperature for as long as needed. If, for example, you use a gas-powered gun, you can quickly heat up the room.

But keeping it on all the time in a closed room, especially without ventilation, is not recommended, since it burns oxygen and after some time you can get carbon monoxide poisoning.

The same applies to a direct heating diesel gun, but if there is good ventilation, using such heat guns is safe for humans. If we're talking about about savings and quick heating of the room, you should use gas guns, with appropriate ventilation in the room, since they do not consume a large number of gas for your work. And if the garages have a gas line that you can connect to, then such guns pay for themselves very quickly.

A diesel heat gun, or as it is also called a diesel heat gun, has a simple design:

Fuel tank;
Burner;
The combustion chamber;
Fan.

In addition, such designs are equipped with a timer, thermostat, and combustion control systems. Fuel is supplied using a nozzle or compressor, after which the fuel is ignited in the combustion chamber. It is best to use a cannon for the garage, equipped with a pipe for exhaust gases to the street.

Heat gun- mobile or stationary equipment designed to quickly heat the surrounding space.

Most units work based on the fan heater principle, with the exception of infrared models, which heat not the air, but the surfaces of objects.

According to their design, heat guns are divided into two groups - direct and indirect heating.

Heaters with direct heating do not remove combustion products from the room, so the warm air contains impurities of spent fuel. Indirectly heated guns are equipped with smoke vents that remove harmful volatile substances outside the premises.

By type of energy carrier used The following models of heat guns are distinguished:

electrical;
gas;
diesel;
multi-fuel.

Electric models, where the heating element is a heating element, do not create noise and do not pollute the air, but consume a large amount of electricity.

This the least economical units, which limits their scope of operation. The devices are used only in electrified premises.

Gas guns- run on liquefied bottled gas. The efficiency of the equipment approaches 100%, the air in a cold room heats up instantly. Direct heating models cannot be used for a long time in rooms without supply ventilation where people are.

Diesel guns- work on diesel fuel. This is a reliable, economical, fast-acting equipment. Flaw - high level noise, specific smell of spent fuel. As well as gas models, are available in two design options- with direct and indirect heating.

Multi-fuel guns They run on waste oil, kerosene, gasoline, and diesel fuel. A productive and durable type of heating equipment, widely used in car repair plants.

Important: all of the listed types of heat guns are launched from the electrical network (including gas and diesel). To the majority metal garages no electricity is supplied, which excludes the possibility of using the equipment.

Especially for such objects Gas units with a built-in battery are produced that can operate for 8-12 hours. The devices heat rooms up to 80 square meters. meters, consuming one Propane cylinder (10 liters). The battery takes a long time to charge - more than 5 hours, which is a disadvantage of the model.

Which heat gun to choose for the garage?

Choosing a heat gun for the garage based on the following factors:

type of structure (stone, metal);
quality of thermal insulation (types of external and internal insulation materials);
presence (absence) of internal electrical wiring;
type of ventilation (if any);
room area;
types of work carried out indoors.

If maintenance and repair work is not carried out in the garage, then a heat gun is used for creating temperature regime , at which the engine starts.

IN in this case, a simple one will do direct heating gas gun, which will instantly raise the air temperature to the desired levels.

In a warm room it is easier to clean and perform simple work operations (wiping glass and bodywork, sorting tools, cleaning the interior, etc.). If there is no ventilation in the garage needs to be ventilated room for 10 minutes after finishing work with a direct heating unit.

Used to heat the air and maintain a positive temperature for a long time. If the garage is used as a workshop, choose an indirect heating unit (with exhaust discharge outside the room). Electrical installation applies, mainly for defrosting surfaces, starting the engine, and performing short-term work.

Technical characteristics and calculation of thermal power

Technical specifications heat guns are:

power, kWt);
speed air flow(m3/hour);
energy consumption per unit of time;
dimensions.

For heating the room with an area of 10 m2, choose a unit with a power of 1-1.3 kW, for a space of 20 m2 - 2.6 kW. These proportions are approximate. More accurate calculations are determined using a special formula, which takes into account heat dissipation coefficients (K), the difference between external and internal temperatures (ΔT), and the cubic capacity of the room (V).

Q - thermal power(kcal/hour):

where K (dissipation coefficient) select from the list:

3,0-4,0 – simple buildings made of sheet metal or wood, not insulated from the outside or inside;
2,0-2,9 – buildings made of single-layer bricks and a simple roof structure (without thermal insulation);
1,0-1,9 – construction made of double brick masonry with fragmentary thermal insulation (for example, floor and walls or roof and floor);
0,6-0,9 – brick garage with double thermal insulation around the perimeter.

To convert kcal/hour to kW, multiply the result by a factor of 0.001163, or use the power value conversion table.

The air flow speed of guns used in household area, is 400-600 m3/second, weight 5-20 kg. Most convenient Compact cylindrical models are considered (they take up minimal space in a standard garage).

For many consumers fundamental importance have additional options that increase the functionality of the unit. This is the presence of a thermostat that turns off the gun when the required temperature is reached, automatic electronic ignition of the burner, blocking of operation during accidental overturning, a flame control system, forced cooling, control sensor carbon dioxide and other functions. Each additional option increases the cost of the equipment.

DIY gas gun

An experienced technician who has an understanding of the operation of gas distributors and safety principles (GOST 8.002-86, GOST R 54983) can design your own cannon.

Basis of design- regular gas-burner, extendable with steel pipe suitable diameter. The holes of a standard burner are enlarged by boring to 5 mm in diameter, and the gas supply hole (nozzle) is increased to 2 mm.

To create a heat exchanger tube is used smaller diameter, into one end of which the burner extension is inserted. All structural elements firmly connected with clamps.

A hole is cut in the heat exchanger and a tube is welded to supply hot air to the room. The fan is fixed on the other side of the heat exchanger. On last stage a hole is drilled to ignite the gas, a valve is installed that acts as a reducer

Independent production of heating systems gas appliances always associated with risk fire hazard situations arise, as craftsmen use improvised means as functional elements and use handicraft technologies.

A garage is a second home for a car enthusiast; at any time of the year and in any weather, the optimal temperature should be maintained there at least periodically. You need to look for acceptable heating options that are suitable for this garage, because you can’t build a fire here, and you’re unlikely to light the stove. Heat gun for garage – best option, you just need to correctly determine its type and parameters.

The garage is not a residential space, however, due to the specifics of its purpose and small dimensions, in no case should open fire or direct-heated appliances be used here. As a rule, it is not necessary to heat a garage constantly, but only as needed, that is, when carrying out repair work, cleaning or organizing the workshop.

The optimal device for periodic heating small rooms– heat gun. In garage conditions, this is an electric gun or with indirect heating. The use of electricity is convenient and financially affordable; a problem may arise due to a discrepancy between the power of the “gun” and the electrical network of the garage cooperative. Of course, an individual garage for own plot should be equipped taking into account the possible use of powerful electrical appliances such as welding machine, the same heat gun.

Before choosing an electric heating device, it is useful to inquire about the capabilities of the existing electrical network. A device with a power of about 3 kW, for which single-core wiring is suitable, will not be able to warm up even a small garage space. More powerful heaters, from 5 to 10 kW, require three-wire wiring with a voltage of 380 V.

Which heat gun to choose for the garage - main types

It is important to evaluate the degree of insulation of garage walls, floors, and ceilings, so as not to unnecessarily heat the environment. The frequency of use of the heating device is also important, because if you stay in the garage for a long time during the cold season, you will need a reliable, powerful, and efficient unit.

The size and location of the “gun” is one of the important criteria. Most use units located on the floor, but there are options for mounted devices. You need to think in advance about the location of the “gun” type heating device, given that it works on the principle of a conventional hair dryer, that is, it produces a powerful stream warm air, warming up the room quickly enough. How and where to place such a garage hair dryer is the owner’s decision.

Let us briefly look at each of the three types of “guns” used:

electrical;
diesel;
gas.

An electric heat gun consists of a heating element and a fan. The greater the power of the device, the faster it will heat the garage space, the less often it will have to be turned on as the air cools. Units powered by electricity are not harmful to health and do not require additional ventilation of the room, but appropriate electrical wiring power is required. Energy consumption, however, is significant, which will inevitably be reflected in utility bills.

A diesel heat gun is an expensive device, but very economical and effective. If it is possible to invest more than $1,000 in such a device, it will consume fuel economically and will please the car enthusiast for a long time. Structurally, diesel guns are divided into direct and indirect heating devices. With direct heating, combustion products remain in the room, creating a health hazard. A diesel heat gun with indirect heating is the same device, but with a special outlet pipe that removes waste to the outside. When using a diesel unit to heat a garage space, you need to periodically ventilate it, since the “gun” takes in air for combustion from the inside, creating inconvenience to breathing. A powerful diesel heat gun is optimal for large rooms, in small typical garage it is ineffective.

A gas heat gun is probably the most suitable option for garage cooperatives with their small premises.

The first plus is that the device itself is relatively inexpensive. The second plus is the fuel used – gas, the cheapest to date. When using liquefied gas from a cylinder, keep in mind that the combustion of one liter of gas provides an hour of gun operation. If you don’t visit the garage often and don’t spend the whole winter day in it, one cylinder lasts for a long time, and the heating efficiency is sufficient. Of course, there are some downsides here too - again, frequent, or better yet constant, ventilation, and therefore cooling, of the garage space is necessary.

Additional heat saving measures

It is believed that maintaining a constant temperature indoors in winter is not lower than +5 o C - best option. It is necessary to insulate the garage so that it, and most importantly the car in it, does not freeze, the engine works properly, starts quickly, the metal parts of the car are not covered with frost, and when thawed, they do not corrode.

It is useful to properly insulate walls and ceilings in order to preserve desired temperature and make periodic use of a heat gun of the selected type effective. You can insulate it by covering the room from the inside or outside with an 8-10 centimeter layer of polystyrene foam or penoizol. These materials are good because they contain antiprene that prevents combustion, thus, fire safety requirements will be met.

Of course, you should not create a hermetically sealed room; be sure to provide ventilation, natural or forced, so that you can safely stay in your garage for the time necessary to carry out minor repairs or care for your car.

Having set up a garage, car fans can spend a long time in it. In this case, it is advisable to purchase two “guns” different types, gas and diesel, for example. The task of the gas one is to quickly heat the air, then the diesel one turns on, which, gradually consuming cheap fuel, maintains the optimal temperature. Craftsmen arrange for air intake for the operation of the unit and waste removal through pipes from the street, without cooling out the garage. The option is somewhat expensive, but convenient and economical.

For most car enthusiasts, as cold weather approaches, the question arises of how to heat the garage. One of the ways to achieve a comfortable temperature is heat guns, essentially powerful fan heaters. A heat gun consists of a heating element and a fan. Thanks to the cylindrical shape of the body, air passing through a heating element, reaches high temperature, and a powerful fan allows short time heat the air in the room.

Heat guns got their name because of their shape. Made in the form of a pipe mounted on a wheeled platform, they resemble cannons from Tsarist times. The presence of small wheels makes it easy to move these heating devices from one room to another.

First of all, you need to calculate the power of the heater. User experience suggests that for heating 25 cubic meters garage, you need 1.5 kilowatts of gun power, despite the fact that the temperature “overboard” will be about zero degrees. If the temperature reaches 10 - 15 degrees below zero, then two or even three times more power will be required.

Having correctly calculated the power of the heater, we select a suitable heat gun for the garage

In order to understand which heater is for your garage fits better All you need to know is:

how many resources the device will consume, and their cost;
how long will people work with the warm device on;
how fireproof this unit is;
Is the garage insulated, and how well?

How to determine the required power of a heat gun

This is the most important and difficult point when choosing a heat gun. It is necessary to determine how much power will be enough to maintain a comfortable temperature in the garage at a given outside temperature.

To do this, you can use a simple ratio: 0.8−1.4 kW of thermal power per 10 m 2 of garage area (with a ceiling height of 2.5 m). That is, for an average garage it is enough to take a gun with a power of up to 3 kW (and if you need a reserve in case of severe frosts - up to 5 kW), and a comfortable temperature will be ensured in it. However, powerful heat guns create significant stress on the wiring, which can lead to trouble.

For a more accurate calculation, you can use a simple formula:

Q = Vxt1-t2xkx0.1 163

Where V- volume of the room, t1- required room temperature, t2— outside air temperature, k— coefficient of thermal insulation of the walls of the room. Multiplying by 0.1 163 is necessary to obtain a numerical value expressed in kW (since the formula derives the amount of heat expressed in calories, and 1 kW/h is equal to 860 kcal/h).

Thermal insulation coefficients for various materials derived experimentally, and they are approximately as follows:

— Simple garage wooden planks or metal - k=3...4;
- Brickwork in line with thermal insulation of medium thickness - k=2...2.9;
- Brickwork in two rows with good thermal insulation - k=1...1.9;
- High-quality thermal insulation of walls and roof - k=0.6...0.9.

This way you can calculate the required heat output of the gun for any type of room. However, as already mentioned, for garages you can use guns at a rate of up to 1.4 kW per 10 m 2 area, and in most cases this will be more than enough.

Types of heat guns

Electric heat guns

A heat gun, the main resource of which is electric current, is similar in principle to a regular hair dryer. The heating element, in most cases a heating element, and the dimensions of the device are slightly larger than those of a household hair dryer. Electric heat gun for the garage, powered by a standard single-phase network, but a gun with a power of five kilowatts or more is connected to three-phase network. The device contains a temperature relay, which controls the device, turning it off if the temperature in the garage has reached the required level, and vice versa. Before purchasing this heater, you need to make sure that electrical wiring in the garage, will be able to withstand the consumed load.

Pros of an electric gun:

Relatively small device dimensions;
Low noise level during operation;
No open fire.

Disadvantages of this type of gun:

High cost of electricity;
The need for power or quality wiring in the garage.

Gas heat guns.

A gas heat gun, as the name suggests, runs on liquefied propane-butane gas. The use of such a heater requires the presence of a gas cylinder of any volume. The principle of operation is that a gas burner is installed inside the cylindrical tube of the gun, which ignites the gas and heats the air. A powerful fan allows you to distribute hot air throughout the garage as quickly as possible. These heaters have a piezo element for easy ignition. All gas guns are direct combustion heaters and do not have the ability to remove exhaust gases from the room. Although guns of this type consume gas economically and do not emit many combustion products, it is still necessary to take care of ventilation in the garage. For ventilation, you can ventilate the room from time to time, but in this case, heat will also leave the garage with exhaust gases.

Interesting: Operating at a power of 10-15 kilowatts, a gas heat gun will consume half a liter of gas in 60 minutes.

Advantages of gas heat guns:

Economical gas consumption;
Due to its low weight, it is easy to transport to other rooms;
Compact dimensions allow you to place it anywhere;
High performance, will help quickly heat the garage;
Availability of a carbon dioxide concentration sensor.

Upsetting nuances of operation:

A gas cylinder is required;
Need quality work ventilation;
Noise during operation;
The presence of a flame does not allow you to leave the device unattended.

The main fuel of diesel heat guns is diesel fuel, or diesel fuel. For the operation of this heater, it does not matter what quality of diesel fuel is used, so it is especially convenient for those who have access to cheap fuel. Work for diesel fuel provides for a fuel tank, and this increases the weight of the unit. On average, a twenty-liter fuel tank lasts for 10 to 15 hours of operation, while the thermal power will be approximately 30 kilowatts. Diesel guns are essentially the most powerful compared to other types.

Diesel heat guns are divided into two types: with direct and indirect heating.

Direct combustion. The operating principle of a direct heating gun is similar to a gas heat gun. The fuel is supplied through a pump to the combustion chamber, where the air is heated and dispersed throughout the garage using a fan. Combustion products also remain in the room and require ventilation.
Indirect combustion. In this case, diesel fuel also burns in the combustion chamber, only the chamber itself does not directly contact with environment, but transfers energy through a heat exchanger. A special exhaust pipe is provided to remove exhaust gases. Although the combustion process still requires oxygen, you will not have to ventilate the room as often.

Advantages of diesel heat guns:

Low fuel consumption;
Thermal efficiency 100%;
Safety of use;

Disadvantages of these guns:

For direct combustion guns, this is the release of exhaust gases into the garage;
Units with indirect combustion cost twice as much;
The presence of a chimney opening for guns with indirect combustion;
High noise level;
The weight of the device is about 20 kilograms;

Combined heat guns.

In order to be able to constantly work in the garage, you can combine guns. Initially, you can use a gas heat gun to warm up the room, and use a diesel heat gun with indirect combustion to maintain the temperature. In this case, there is no need to constantly ventilate the garage, and at the same time maintain comfortable temperature. However, this method has one big drawback— this is the cost of purchasing two guns.

Based on the above advantages and disadvantages, we can see the following. Usage electric guns convenient and safe in the sense that they do not require additional conditions, such as a fuel tank or cylinder, a fresh air ventilation system or a chimney opening in a garage. However, the productivity of such heaters is quite low, and energy consumption is high. In addition, if the electrical circuit is weak, it is unlikely that you will be able to practice welding work and heating at the same time. It's also not safe.

Gas heat guns are more productive, but the consequence of their work is the presence carbon monoxide in the garage. And since it's a garage, it's usually not very large room, the concentration of carbon dioxide will be higher and it will be more tedious to ventilate the room. If this is not done, then a process of poisoning of the body occurs. Therefore, a gas heat gun is not the best option for heating a garage.

Diesel heat guns are “above all praise.” Although they have the largest dimensions of all guns, there is still room in the garage to install this unit. Of course, the high cost of an indirect combustion gun is its disadvantage, but productivity makes up for all the shortcomings. Such a gun allows you to safely heat the garage without harming the health of the owner. It is fireproof because the fuel, when ignited, does not come into contact with the environment. On it, like on any other gun, you still cannot dry things and gloves. It also requires 220V power to operate, but it does not require power line or wiring High Quality. Electricity is needed to operate the fan, and any electrical network can handle its power consumption.

Sections