Last updated: August 9, 2021

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Welcome to our large heat gun test 2021. Here we present all the heat guns we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the web. We would like to make your purchase decision easier and help you find the best heat gun for you.

You will also find answers to frequently asked questions in our guide. If available, we also offer interesting test videos. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy a heat gun.




Summary

  • Heating cannons are equipped with a heating fan and are reminiscent of a cannon in shape. Depending on the model, they are suitable for heating small rooms, large halls, greenhouses and even for drying building materials.
  • Depending on the purpose, you can choose between several types of heating cannons: direct oil heating cannons, indirect oil heating cannons, diesel heating cannons, electric heating cannons and gas heating cannons.
  • When buying, you should make sure that the device has the necessary safety equipment. Flame monitoring, automatic switch-off and protective grids should be present in any case.

The Best Heating Gun: Our Picks

Guide: Questions you should ask yourself before buying a heat gun

Are you thinking about buying a heat gun, but are a bit overwhelmed by the selection and the different offers? Then you've come to the right place, because we'll explain what you should look out for when buying a heat gun.

What is a heating cannon?

Heating cannons belong to the group of direct heaters or quick heaters and are reminiscent of a cannon in terms of shape. In most cases, a heating cannon has wheels to make it easier to transport. However, floor-standing units are also available.

Direct heaters are characterised by the fact that they are very powerful and heat up quickly.

They are also equipped with a very powerful fan, which distinguishes them from a radiant heater. The fan ensures that heat is distributed in the room due to rapid air circulation. There is no clear distinction from fan heaters. Usually, one speaks of heating canons when the heat output exceeds 4,000 watts. Pure radiators are also not cannons because they do not have fans.

What do I need a heating cannon for?

Heating cannons are particularly suitable as a short-term, effective and mobile heat source. They are used in a wide range of applications, from industrial, commercial and craft areas. They are often used to heat large halls (festival and sports halls), open-plan offices or storage rooms.

They are also used in agriculture. There, among other things, heating cannons are used to heat stables and nurseries. Greenhouses can also be brought to an optimal temperature with them. Heating cannons are even suitable for drying harvest products.

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Heating cannons come in many models and can be used in many different ways. (Image source: 123rf.com / 34796933)

Even on construction sites, heat cannons can provide useful services. During renovation work, they can help to dry out building materials. In addition, construction site workers benefit from them when they are working in otherwise cold unfinished buildings. There is now a wide range of different models, which are either suitable for special purposes or can be used universally.

How do heat guns work?

Heating cannons work according to a relatively simple principle: The air is sucked in by the device, heated via special heating elements and then distributed throughout the room. Furthermore, it is possible to connect the heating cannon to a hose. This supplies it with oxygen and ensures that warm ambient air is generated directly. It is also possible to discharge humid air from the room to the outside via a special exhaust hose.

This method is particularly suitable for drying. Furthermore, heating cannons are equipped with a built-in thermostat, which is controlled digitally or by remote control. Many models also have a manual control dial. In terms of performance, heating cannons cannot be clearly distinguished from other portable electric heating systems. The construction hardly differs from radiant heaters or fan heaters.

However, there are differences with regard to the intended use. A heating cannon is ideal for heating large rooms, whereas a small fan heater cannot achieve such a performance.

What does a heat gun cost?

The cost of a heat gun depends largely on the type of heater and how often it is used. Devices with a higher output consume more energy or fuel and are therefore more expensive. You can get a simple gas fan heater with an output of 25 kW for as little as 150 euros. You have to spend at least 200 euros on oil heaters and electric heaters.
Type Price
25 kW 150€
over 30 kW 500-1,000€
over 60 kW 1,000-2,000€

If you need a heating cannon with an output of more than 30 kW, the costs rise to between 500 and 1,000€. For an indirect oil-fired fan heater, one pays at least 700 euros. If you want a model with an output of over 60 kW, you have to reckon with costs between 1,000 and 2,000 euros.

What should I look for when buying?

First of all, it is essential that heat guns are suitable for the intended use. For this reason, it is advisable to look around carefully and compare before buying. If you have a preference for a particular model, it is worthwhile not to buy immediately, but to look for other suppliers and compare prices.

This can often save you several hundred euros. Also consider whether you need a heat gun regularly or only for a short time. For infrequent use, it makes sense to resort to a second-hand device. Some specialist markets even offer the possibility of renting heating cannons.

Advantages
  • Can heat larger rooms
  • Suitable for heating up rooms quickly
  • Distributes the heat evenly in the room
  • Versatile
  • Can also be used for dehumidifying
Disadvantages
  • 230 volt connection is required
  • High noise level
  • Not all heat guns are suitable for enclosed spaces

Find out in advance what accessories you need to operate your heat gun. For most models, these are included in the purchase price. However, there are exceptions. In some cases, hoses, attachments and connectors must be purchased separately. Safety is of course also an important issue.

Since heat guns are not entirely risk-free, you should look for certificates and test seals that identify a model as a quality product. Examples include the VDE mark, the TÜV or the GS mark.

Decision: What types of heat guns are there and which is the right one for you?

When looking for a suitable heat gun, you have a wide range of different models to choose from. Which of the following is the most suitable for you depends primarily on the purpose for which you need it. Basically, a distinction is made between these types of heating cannons:

  • direct oil heater
  • indirect oil heating cannon
  • Diesel heating cannon
  • Electric heating canon
  • Gas heating canon

To make your search for the perfect heat gun easier, we will go into more detail about the different types in the next section. We will also explain the advantages and disadvantages of the different types of heat guns to give you a good overview of their features.

What distinguishes a direct oil heating cannon and what are the advantages and disadvantages?

Direct oil heating cannons get their oxygen supply directly from the room. In addition, exhaust gases are emitted directly into the room. It consists of a tank and a pump that finely atomises the oil via a nozzle.

Advantages
  • Heating output over 50 kW possible
Disadvantages
  • Not suitable for small rooms
  • Produces exhaust gases
  • Consumes oxygen

The heating oil mist burns in a combustion chamber. This chamber, in which the flame burns, is open.

Fuel is injected as long as the flame is burning. The burning process is checked by a photocell. The fuel supply is stopped as soon as the flame goes out. In addition, exhaust gases are emitted directly into the room. Since the exhaust gases are not disposed of via a chimney connection, small rooms should not be heated with it.

What are the characteristics of an indirect oil heater and what are the advantages and disadvantages?

Indirect oil heating cannons have connections for fresh air supply, a chimney connection and a connection for exhaust gases. In contrast to direct oil heating cannons, the flame of indirect oil heating cannons is enclosed in a separate combustion chamber.

This makes this variant also suitable for heating smaller rooms, provided that the connections are set correctly.

Advantages
  • Heating capacity over 50 kW possible
  • Suitable for drying buildings
Disadvantages
  • Not suitable for small rooms
  • Produces exhaust gases
  • Consumes oxygen

Indirect oil heating cannons are particularly suitable for drying buildings, as the moist air can be conducted outside very easily.

What are the advantages and disadvantages of diesel heat guns?

With these models, the heat is generated by burning diesel or heating oil. The heat output of a diesel cannon is over 60 kW. Cold air is sucked in via a turbine and releases the heated air into the environment. In contrast to the gas cannon, the tank is located in the device itself.

Advantages
  • Diesel available at all times
  • Over 60 kW heating power
Disadvantages
  • Produces exhaust gases
  • Consumes oxygen

Diesel heaters consume oxygen and produce exhaust gases. For this reason, these models may only be used in well-ventilated rooms.

To prevent the fuel from freezing, a special fuel (winter diesel) is required in winter. An advantage of diesel heat cannons is that diesel is available around the clock at many petrol stations.

What distinguishes an electric heat gun and what are the advantages and disadvantages?

Electric heat guns are bestsellers because they can be connected to a construction power distributor or a CEE socket. They are also quieter than gas cannons and diesel cannons and do not require fuel. With electric heating cannons, the heat is generated by high voltage current.

The heat output is between 25 and 35 kW. The ambient air is heated by heating rods.

Advantages
  • Can be connected to a building power distributor or CEE socket
  • Low noise level
  • Do not require fuel
  • Suitable for small rooms and greenhouses
Disadvantages
  • Low heat output

Electric fan heaters are ideal for small rooms as they do not consume oxygen and do not produce exhaust fumes. They are also ideal for heating greenhouses.

What are the advantages and disadvantages of a gas cannon?

Gas cannons are able to get the maximum heat output out of a cannon. These devices can achieve a heat output of up to 100 kW. However, they do not have a tank, which is why you need gas cylinders for operation.

Advantages
  • Heating output over 100 kW possible
  • Suitable for large halls
Disadvantages
  • You need additional gas bottles
  • You need different gas heaters for different seasons
  • High risk potential

You can distinguish between two gas heating cannons: Propane gas and butane gas. Butane gas does not require as high a pressure as propane gas, which means that the gas cylinders are lighter. However, butane gas can only be used in the summer months.

As soon as the temperatures drop and it gets frosty, you have to resort to propane gas. Gas heaters are particularly suitable for large halls, provided there is a sufficient air supply. Never use gas cannons in closed rooms!

Purchase criteria: Use these factors to compare and evaluate heating cannons

In the following, we will show you which criteria you can use to compare and evaluate heating cannons. This will make it easier for you to get an overview and decide on a suitable and effective device. In summary, these are the following criteria:

  • Heating capacity
  • Flame monitoring
  • Automatic switch-off
  • Protective grille
  • Thermostat control
  • Transport
  • Design

In the following, you can read about the respective criteria and find out why it makes sense for you to purchase a device based on the criteria or not.

Heat output

Depending on the intended use of your heat gun, the heat output plays an important role. For your own four walls, you probably won't need too much heat, which is why an electric heater is the best choice. However, if you intend to heat a large room or even a hall, a gas cannon is recommended.

Flame control

Gas and diesel cannons in particular have the disadvantage of being highly flammable. For this reason, those devices should be equipped with an electronic flame monitor and an oxygen deficiency safety device.

Automatic switch-off

An automatic shut-off system ensures that a heat gun switches off automatically in the event of overheating. This prevents the unit from being damaged and bursting into flames.

Protective grille

When a heat gun is in operation, the inside of the unit in particular heats up very strongly. To prevent people (especially children and pets) from accidentally touching hot parts, a protective grille should be an absolute must.

Thermostat control

For better and more effective temperature control, some heaters have a built-in thermostat. This is particularly useful for greenhouses to ensure a constant temperature. However, if you only need a heat gun for short term heating, a thermostat control is not very useful.

Transport

To make transporting the cannon more comfortable, it should have a carrying handle or wheels. This is highly recommended because the surface temperature of the heater can become very high, making it very difficult to transport without aids.

Design

If you prefer a certain design for your heater, you can choose between different colours.

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The design of heaters is usually very simple. (Source: 123rf.com / 77772695)

However, most devices are very simple in design. Almost all models are single-coloured. Special shapes, colourful paintwork or other visual extras are very rare.

Facts worth knowing about heat guns

Finally, we would like to explain why it is so important to avoid gas heaters in closed rooms.

Why you should avoid gas heaters in closed rooms

If you use a gas heater in closed rooms, combustion gases can accumulate within a very short time. In addition to harmless water vapour, there is also a risk of carbon dioxide or toxic carbon monoxide (CO) forming. Since carbon monoxide is lighter than air, it rises to the ceiling if there is no possibility of exhausting it. The room thus gradually fills up with carbon monoxide.

Effect

During breathing, the gas enters the lungs and subsequently the blood. The gas binds 300 times more strongly to the red blood cells than oxygen. This means that oxygen has no chance of reaching the vital organs via the blood platelets.

At high carbon monoxide concentrations, just a few breaths are enough to kill a person. You virtually suffocate internally, even though breathing is no more difficult.

Symptoms

Depending on the concentration of CO, symptoms gradually become noticeable:

concentration symptoms
slight slight headache slight dizziness Nausea Fatigue Twitching limbs
medium severe headache severe nausea pink skin due to lack of oxygen Palpitations Unconsciousness
high

Unconsciousness Death within 2 minutes

In a ventilated room, the risk to your health is very low. However, if you are using a gas heater and experience any of the symptoms described above, turn off the heater immediately and get some fresh air.

(Image source: 123rf.com / 97734203)

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