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, in fact, 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 you to heat the air in the room in a short time.
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 to heat 25 cubic meters of garage, 1.5 kilowatts of gun power is needed, 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 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.
For this you can use simple relation: 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 one row 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 walls and roofs - 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 of 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 garage, powered by standard single-phase network, however, a gun with a power of five kilowatts and above is connected to a 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 the electrical wiring in the garage can withstand the load consumed.
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 inside the cylindrical tube of the gun, gas-burner, which ignites the gas and heats the air. Powerful fan, allows you to spread as quickly as possible hot air, around the garage. 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 concentration sensor carbon dioxide.
Upsetting nuances of operation:
- A gas cylinder is required;
- High-quality ventilation is needed;
- 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. Working on diesel fuel requires 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, with a thermal power of 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 heat 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 - the cost of purchasing two guns.
Based on the above advantages and disadvantages, we can see the following. The use of electric guns is convenient and safe in the sense that they do not require additional conditions, such as a fuel tank or cylinder, system supply ventilation or chimney hole in the garage. However, the productivity of such heaters is quite low, and energy consumption is high. Moreover, with weak electrical circuit, it’s unlikely to be possible to study welding work and heating at the same time. It's also not safe.
Gas heat guns are more productive, but the consequence of their operation is the presence of 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 high quality wiring. Electricity is needed to operate the fan, and any electrical network can handle its power consumption.
As a rule, heat guns of various configurations are used for drying objects under construction and heating wide-range production facilities, because these are powerful, high-performance machines. But recently, many manufacturers have launched the production of small-sized devices up to 3-5 kW, so that many car enthusiasts have a heat gun for the garage, with which they can quickly heat small room.
Equipment of this class are effective devices for heating any room using directed hot air. The efficiency of any heat gun reaches almost 100%. The following types of products are available for sale:
- Electric - they work for heating only if there is a household power supply.
- Diesel - the operating principle is based on burning fuel in a combustion chamber with subsequent heating of the air flow.
- Gas - the principle is similar to the second option, but they run on blue fuel, they are much more economical because gas is cheaper.
Each type has its own specific features, advantages and small disadvantages.
Electrical
Electric fan heaters have the following advantages:
- small dimensions allow the product to be installed in almost any room;
- full automatic control;
- silent operation;
- enough high level fire safety.
The disadvantages include high cost electrical energy. In addition, before installing the heat gun, it is necessary to check the wiring so that it can withstand the voltage from using such equipment. Devices must have overheating protection and automation to maintain an optimal constant temperature.
Diesel
These products have two types of heating: direct and indirect. In the first option, the room is heated by air flow, which contains combustion products, so it is necessary to install supply ventilation. In the case of indirect heating, the heat gun has a design that allows combustion products to be removed from the combustion chamber through a special pipe, which simply needs to be connected to a chimney pipe or a corrugated hose.
When choosing a heat gun for a garage, you need to think through and calculate all the options - take into account the volume of the room, how to remove combustion products. Without a doubt, an indirectly heated device is much more better than analogue
with a direct heating method, when there is a danger of smoke in the entire room.
- Experts consider the following indicators to be advantages:
- economical fuel consumption;
- heat guns of this class operate for up to 14 hours on one tank refill;
effective heating of a garage of any size, even two floors. The disadvantages are price diesel fuel
, and the smell of burnt diesel fuel leaves an unpleasant odor that is not removed by any ventilation system.
Gas
- Such guns have a number of advantages over their diesel counterparts:
- heat the room much faster;
- heating of this type is many times more economical due to lower gas consumption and cost;
- there is a sensor that reads the concentration of carbon dioxide;
- automation that controls equipment overheating;
propane or butane burns completely - there is no need to install a special exhaust system, ordinary ventilation, which is found in every garage, is sufficient. There is one, but enough significant drawback : for the operation of the unit it is necessary liquefied gas cylinder
, which is quite difficult to get.
Advice! If the garage does not have good ventilation, then all the options will not suit you; the room will not be heated to its full extent due to frequent ventilation by opening the gate.
Choosing a heat gun
The main parameter when choosing a product is its power; excess power will waste the meter, and a deficiency will simply not be able to provide sufficient heating of the garage. Experts, through measurements and various experiments, have established that 10 m2 of any private garage can be heated with 1 kW of thermal power if the ceiling height is within 3 m., then it wouldn’t hurt to increase the power to 5 kW. It should be taken into account that you will turn on the unit at full power only in exceptional cases. Which gun is right for you - decide for yourself.
Insulation of the garage
Before installing any type of heater or fan heater, you need to take care additional insulation of the garage, especially the gate: the less heat leaks, the longer the garage will maintain an acceptable temperature. Otherwise, the gun will work to heat the space surrounding the garage, i.e. constantly.
Car enthusiasts should not forget that this room serves not only to shelter the car from weather disasters and thieves, but also for minor repairs and preventive work. In particularly severe frosts, when you decide to thoroughly warm up the room, condensation may form on the iron gates due to the temperature difference, which will negatively affect the metal.
Optimal temperature for high-quality storage of equipment in winter period is +5 0 C.
To properly insulate walls, use sheets of special foam plastic or penoizol. Latest material It is considered the most progressive type of insulation, it retains heat much better, is very similar to polyurethane foam in thermal conductivity, but costs much less.
We insulate the ceiling in the same way, but for the gate there are several options:
- foam blocks - retain heat well and do not absorb moisture;
- extruded polystyrene foam - has even better rigidity and retains heat well;
- foil foamed polyethylene - differs in that one side is covered with foil, used in combination with the first types of insulation.
During all insulation work, it is necessary to resolve the issue of better ventilation. To do this you can do hood directly from interior space garage - direct exit to the outside. A cement-asbestos pipe will suffice standard diameter and size.
Features of using guns
Today it is electric fan heaters different types and the devices are considered the most popular for quickly heating the garage, although the condition of the wiring leaves much to be desired. Therefore, fire inspectors like to visit such public places to draw up reports of various violations.
It is no secret that the indirect cause of all fires in garages is the improper use of heaters of various types, from homemade to factory-made models. electric gun any power, you need to consult with energy network specialists. In addition, you must comply certain rules operation of products of any kind.
- After purchasing the equipment, you need to let it sit in a warm place for at least 2 hours.
- If this is a diesel version or a gas heat gun, purchased specifically for a pre-insulated garage, it is better to start them for the first time at outdoors so that the factory grease burns.
- Before turning on the electric option, you must check for the presence of condensation on the heating elements, and also inspect the grounding of the garage wiring.
- A gun operating on waste oil is checked for the presence of foreign objects in the fuel tank before filling with fuel.
- When using a chimney, it must have good draft and a minimum of bends.
- When connecting a gas gun, check all connections for leaks, otherwise the first activation may be the last.
The device must be installed only on a flat surface, the distance from the outlet nozzle to walls or other objects is at least 3 m, 0.5 m on the sides is enough, and 1.5 m on top. Such precautions are necessary so that the flow of forced air spreads freely throughout room.
As for the cost: they are considered the most expensive diesel devices: their price starts from $200, gas ones average around $150, but electric options from $50. Having done right choice, you will forget about frozen hands and an engine that won’t start due to the cold for at least six months - working in the garage will be comfortable, even though there is severe frost outside the gate.
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 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 fired 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 number 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 fresh ventilation where people are present.
Diesel guns- work on diesel fuel. This is a reliable, economical, fast-acting equipment. Disadvantage - high noise level, 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 listed species 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 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 applied, 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);
- air flow speed (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 by 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 - double construction brickwork 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 the domestic 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 includes 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, a carbon dioxide control sensor 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- a conventional 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 a tube of smaller diameter is used, into one end of which a 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. At the last stage a hole is drilled to ignite the gas, a valve is installed that acts as a reducer
Independent production of heating gas appliances always associated with risk fire hazard situations arise, as craftsmen use improvised means as functional elements and use handicraft technologies.
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? It remains to count on autonomous systems heating 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 a mandatory ventilation device. 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 its liquid and cheaper 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 shot onto 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. A 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 colder than winter and the “thinner” the wall, the more power is needed heating device. The more often and for a longer period of 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. those generating electric current with voltages up to 400 V are 5-6 times more expensive than those generating current with 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 are divided by design 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 there is gas gun 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 needed constantly, 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.
A heat gun for a garage allows you to heat the room as quickly as possible. When faced with the topic of choosing such a device, you can’t immediately decide. Advertising advises one thing - the reality is often different. The choice should be based on several factors that you know about, because the garage is yours...
Let's start with the device and purpose
A heat gun is an indispensable thing for unheated premises in our climatic conditions. Its device resembles the design of a hair dryer: heater, fan, housing, thermostat. To provide high speed For heating the room, the fan in such devices is installed quite powerful. Air flow The energy it creates passes through the heating element and... heats up. In return, the fan draws in a new portion of air. Heat gun for garage - mobile device. Depending on the size, this peaceful “weapon” can either be moved or rolled to another “dislocation” location. Why a gun? Simply because of the external similarity: the body in the form of a cylindrical pipe is located on the frame either horizontally or raised upward.
Selecting parameters
The choice of a heat gun begins with determining the type and power for the garage is determined based on:
- garage area;
- the quality of its thermal insulation (or lack thereof);
- mode of presence of people in the room.
Based on the type of heat source used, garage heat guns are divided into:
- gas;
- diesel;
- electric.
- combined.
Gas heat gun for garage - optimal choice in terms of power, efficiency and speed of heating the room. But it is not suitable for use in a room with people constantly present in it - this is a direct heating device.
Combustion products during the heating process will accumulate in the garage, poisoning your body. And constantly ventilating the garage simply “releases” the heat to the street. Heating a garage with a gas gun is unacceptable!
It is convenient to use for quickly warming up a room, but not for constant heating. A power of 10-15 kW will require only 0.5 liters of liquefied gas per hour of operation.
A diesel heat gun for a garage has an “exhaust” pipe, that is, combustion products are discharged outside the garage. It is capable of heating a garage for a long time without harming the person in it.
The easiest to maintain is an electric heat gun. I plugged it into the outlet, pressed the button and forgot - the thermostat will take care of its operating mode (if there is one, of course).
But there are a couple of pitfalls here! Typically, power lines in garage arrays are not highly reliable—they simply may not be able to withstand the load. Especially if there will be a lot of people like you (with guns). You should pay attention to this nuance when choosing.
The second stumbling block is the rather substantial bills for electricity converted into heat, that is, heating the garage with an electric heat gun.
Calculating the power of the “gun”
Knowledge of mathematics (at least from school) will come in handy here! Stop, stop! Higher mathematics is not needed here - read on!
In order for heating a garage with a gas gun to be effective, it is necessary to determine sufficient power to bring and maintain the temperature in the room at the desired “level.” What if the frosts are severe?..
We take into account the following ratio:
0.8 - 1.4 kW gun power ↔ 10 m 2 garage area
and this is with a ceiling height of up to 2.5 m.
For our “average” garage, 3 kW of power will be enough. If the lines allow, then 5 kW is a reserve in case of extreme cold. For those who like to count, we present a more accurate “method” of calculation.
More details about each type
Electric heaters
The simplest heat gun, familiar to everyone today, is a fan heater. For the garage, a “fan heater” of much higher power is used. It should be understood that an electric heat gun for a garage is a “gluttonous little thing”, and devices with a power of over five kilowatts are powered from a three-phase network electric current voltage 380 V.
Heat is produced when electric current passes through a conductor with high electrical resistance located in a tubular protective housing. This system is called heating element.
The fan blows air onto the heating elements and transfers heat into the room.
Functionally similar electric heat guns for garages are not suitable for heating rooms with harsh “climatic” conditions, for example high humidity(saunas, baths...) They are inferior in performance to their gas and diesel counterparts.
And they “eat” a lot of very expensive electricity.
Gas guns
Lightweight and inexpensive heating devices, with a power from 10 kW to 100 kW, but they require you to carry a liquefied gas cylinder with you, which, by the way, also needs to be refilled somewhere.
Despite the small amount of combustible gas (which determines their efficiency), ventilation is required when operating such devices. When connecting a gas gun to the main line natural gas the compliance of all parameters must be taken into account. For example, for a heater with 10 kW of power, a gas pressure of 0.5 bar is required, and an increase in power will “require” an increase in pressure.
The devices are equipped with automatic protective elements (flame control, thermal fuse - protection against overheating).
Diesel heat guns
The essence of the operation of these units is the same as that of gas units. But the fuel is different - diesel fuel. There are fewer maintenance amenities, but there is plenty of quality.
Fuel enters the combustion chamber under “control” fuel pump, which is “commanded” by the installation’s electronic control unit. This installation includes a fuel tank, which increases its mass. Combustion products must be removed from the premises.
Among the advantages: affordable fuel, economical operation (10-15 hours at one gas station), relatively safe fuel. There are direct and indirect heating models.
Indirect heating models use an additional heat exchanger and the combustion chamber is not in contact with the room air. Combustion products exit through the “exhaust” pipe.