How to make a heat gun with your own hands

Building your own heat gun can be done rapidly. All you need to do is gather the necessary materials, select a suitable type of heating mechanism, and determine whether it will be powered by electricity, gas, or alternative fuel sources.

Briefly about the classification

• electric heat gun;
• diesel-powered heat gun;
• gas-powered heat gun;
• infrared heating elements;
• water-based heat gun;
• mono-fuel heat gun.

Our primary focus is on creating a heat gun that operates on electrical power, as it is the most common and safe option. It’s easy to maintain, doesn’t require checking for fuel in the tank, and is environmentally friendly.

Functional features

If you lack the financial means to buy a patented factory-made apparatus, then constructing a homemade heat gun is your only option to carry out your planned repairs or construction projects.

The operation principle of such a device is straightforward: heaters are installed in a pipe made of asbestos or metal, or a spiral is arranged in a specific manner. On one side, a powerful fan is inserted to blow air into the pipe, where it gets heated before being released into the room through the opposite opening.

These types of electrical appliances have the ability to rapidly warm up rooms of various sizes. The speed at which they can achieve an optimal temperature depends on the strength of the heating elements – the stronger they are, the faster the desired temperature is reached. However, there is one drawback: they consume a significant amount of energy and have a tendency to dry out the air quickly. In order to counteract this, it is recommended to place an open container of water nearby when using them in a living room to add moisture to the air.

DIY heat guns are commonly created by skilled individuals in garages for heating such rooms during the winter months.

Electric gun

Before moving forward with production, a comprehensive electrical diagram for the device is created, and all of the components are carefully assembled.

Diagram of the electrical firearm:

In order to construct a do-it-yourself heat gun, you will require the following materials:

1. An asbestos-zinc pipe with a large diameter to accommodate the fan. Some individuals prefer to create a case out of galvanized metal that is at least 1 meter thick, resulting in a more portable homemade device.
2. An electric motor and impeller for the fan assembly – these can be purchased at stores or assembled from various materials, such as repurposing an old fan and a vacuum cleaner motor.
3. The heating elements can be fashioned out of special wire that is wound around the electrode. This will yield a spiral shape, similar to those found on an electric stove. However, it is important to make preliminary calculations, as otherwise, such a gun could potentially cause a power outage in the entire neighborhood.
4. Buy or collect ceramic insulators, copper wire with a minimum cross section of 2 mm, 24 A fuses, wire connection with a plug, and other small items.

Once you have obtained all the necessary materials and components, you can proceed to assemble the electrical part based on the previously formulated design. Here is how you can assemble an electric heat gun:

• Prepare the body and support, making sure to include an insulating pad.
• Arrange the coil in a star shape and secure it inside the housing, or position the heating elements in the center of the tube.
• Connect the power supply wires to the designated terminals.
• Secure the fan and establish the necessary wiring connections.
• Attach protective grilles on both sides of the housing for safety purposes.
• Mount the control unit and connect all the relevant wiring components to it.
• Finally, install the mains connection cable.

When assembling the heat gun, it is important to insulate all the connections of the electrical circuit properly. It is crucial to pay special attention to the details since everything is done by hand. Once the work is finished, it is recommended to perform a test run to ensure that the system functions correctly. If the test run is successful, there is no need to worry, and the product can be used without any concern.

It is worth noting that safety should be a top priority during the assembly process. To prevent any fire hazards, it is necessary to protect the metal body of the pipe with an asbestos lining at the base. Additionally, all the wiring must be carefully insulated.

Diesel heat generator

Sometimes, not only for the sake of saving money, but also in cases where there are no nearby power sources, a diesel-powered heater can be used to warm up a space. The way it works and its design differ significantly from electric heaters. Before you start building one, it’s important to obtain the blueprints, carefully examine them, and then gather all the necessary components. The most basic indirect diesel heater consists of the following main parts:

1. A cylindrical body made of strong metal.
2. A fuel tank, transfer pump, and filter element.
3. A combustion chamber made of thick metal with one or more nozzles to atomize the diesel fuel.
4. A fan for blowing air.
5. A chimney pipe to exhaust the combustion byproducts.

Begin the assembly process of the diesel heat gun by placing the fan inside the primary body, followed by the insertion and centering of the combustion chamber. Connect the fuel piping system from the tank to the nozzle, ensuring that the fuel tank is located in the lowest part of the structure to prevent direct contact with the pipe body for safety reasons.

When acquiring the tank for the diesel heat gun, it is essential to opt for a factory-made one, even if you are assembling the device yourself. This prioritizes safety measures and guarantees optimal performance.

Adjacent to the pump and fine filter is securely installed. The pump is linked to the nozzle through a copper tube. Inside the combustion chamber, a factory piezo element is positioned for igniting atomized fuel. At the top of the chamber, an exhaust pipe is constructed to expel all combustion byproducts into the atmosphere. On either side of the casing, protective grates are installed to prevent inadvertent contact with the glowing tip of the combustion chamber and to safeguard individuals from the fan in motion.

Creating your own diesel installation may appear deceptively simple, but it is a complex task that requires a certain level of expertise. If you lack proper knowledge, it is advisable to invest in a factory-made version, as it guarantees fire safety.

Oil-powered cannon

Instead of reinventing the wheel, some DIY enthusiasts in the garage make their own devices using waste oil. However, there are factory installations that have been authorized for use in any type of premises. These factory installations are capable of working with any type of hydraulic or engine waste product, which can be obtained at a low cost.

An individually crafted waste oil heat gun made by a handyman in the garage might be cheaper, but safety is a concern. If anything were to happen to the homemade installation functioning on waste oil, who would be held accountable? On the other hand, with the factory version, all combustion products are safely discharged through an external pipe. In contrast, a homemade unit often burns oil in a dirty cup using a blowtorch, which poses potential hazards. Not only does the factory version have a 100% efficiency rating, but the combustion of oil also does not negatively impact the environment inside the room, which cannot be said for homemade production.

Gas heat generator

The gas heat gun operates on the same principle as the diesel version and is assembled in a similar manner. However, instead of using diesel fuel, it is powered by gas. This type of heat gun is known for its higher fire hazard due to the presence of an open flame inside the housing. These devices can be purchased at specialized retail stores, with prices starting from 5.1 thousand rubles. Additionally, they undergo inspection and certification by the fire department to ensure their safe use in various environments.

The homemade unit lacks reliability, producing noises and smoke in various modes. Additionally, the open fire inside an uncovered pipe poses a safety risk. Furthermore, the burners, often manufactured in China, do not come with any warranty.

If you encounter any issues with the factory version, you can simply reach out to a service center, where skilled technicians will address all your concerns. In contrast, repairing artisanal equipment, especially when critical components are damaged, can be much more challenging, and may not even be feasible. You can assess its performance by watching a video demonstration.

Gas guns that are made at home are extremely hazardous devices, lacking any safeguards against overheating or flame control. It is crucial to never leave them unattended, even for a moment.

Gas Heat Generator Design

A common misconception among users is that assembling and repairing a heat gun is a simple task. However, this is not the case – without proper knowledge and technical skills, attempting to create a DIY heat generator can result in a makeshift and potentially dangerous device. It is important to remember that an electric heat gun created by an inexperienced individual can pose risks such as electrical injuries and short circuits if a simple assembly mistake is made. Other types of heat guns, particularly those that utilize open flames, can also be a potential fire hazard.