Propane Thermal Foggers: Their Parts and Use

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There are many different types of foggers out there including electric and fuel-powered foggers. Each of these types has different parts suited for either cold or thermal fogging. Today, we’ll take a look at propane thermal foggers, a subcategory of thermal foggers, and learn about their different components.

Thermal Foggers

It’s vital to know each part of your fogging device as well as the basic operational principles. This knowledge will be useful for maintenance and repairs on your fogging device. It’ll also help you understand the safety precautions you’ll need to consider when operating your insect fogger.

Generally, a fogger is a device that turns a liquid into a fog, which consists of very small particles of this liquid. The basics of each fogger are the same, whether for insect fogging, plant fogging, or other activities. To perform such processes a fogger must have some special components.

How Thermal Foggers Work

First of all, the body of a fogger must be easy to carry around. For this, most foggers have a specially-made handle on top of the device. The body of a fogger is usually made from tough plastic, like nylon. The most important buttons and triggers used to operate the fogger are on the body as well. These triggers are generally located in spots that are easy to reach during the fogging process.

The most important part of a fogger is the spray nozzle, located on the front of the fogger. This spray nozzle consists of a few key parts such as the coil, the protection basket, and the spray tip. The spray nozzle is heated so that the liquid running through it becomes heated and vaporizes. It’s then sprayed out in a cloud of very small particles that look fog.

The insecticide or fogging liquid goes in a special container under the body of a fogger. These containers are usually made from plastic, but on high-end and commercial foggers they are usually made of metal instead. In this container is a small pump that carries the insecticide to the spray nozzle.

Thermal Fogger Heating Systems

The type of system used to heat the nozzle is based on the type of thermal fogger. Electric foggers use electricity to create heat. For that reason, they must have access to a power outlet to heat the burner and coil in the nozzle.

A propane fogger needs a propane gas cylinder, which attaches at the back of the fogger. After attaching the cylinder, you have to open a fuel valve to allow the propane gas to flow to the nozzle of the fogger.

The propane gas cylinders used on foggers are quite small. This makes propane foggers very portable, so you can carry and use them practically anywhere. With propane foggers, there are no restrictions like with electric foggers, which need a permanent power source to function.

Propane Thermal Foggers: The Parts

A propane fogger is a special type of insect fogger that uses propane gas to heat the burner and coil. You must attach a cylinder containing propane gas to the back of the fogger for it to work. The following are the parts of a propane thermal fogger:


Body and Handle

The body of the fogger holds the parts of the fogger together. The purpose of the fogger’s body is not only to hold each part together but also to take the liquid from the container and deliver it to the nozzle.

On top of the body is a handle for holding the fogger. The body and handle of most propane foggers are durable plastic. The handle needs to be as easy as possible to use, so most buttons and triggers are on either the body or the handle, including the following:

  • Fogging Trigger: This is the trigger you are going to use the most since it controls the fogging process. In other words, you can start fogging by pressing the trigger and stop the fog by releasing the trigger. The fogging trigger on each mosquito fogger has a different level of sensitivity. Some foggers will output a lot of fog with just a soft touch of the trigger. On others, you’ll have to press the trigger multiple time to release the same amount of fog.
  • Trigger-Lock: This button locks or unlocks the fogging trigger. It’s a safety measure that stops the fogger from accidentally pumping and spraying fog since accidental fog release can be dangerous.
  • Igniter: The igniter creates a spark that lights the coil so it can start to heat up. You can also achieve this with a regular lighter or match by lighting the coil from outside the coil basket, if needed.

Insecticide Container

On the bottom of the fogger is a tank that holds the insecticide or any other fogging liquid. Inside this container is a special pump, which will start pumping the liquid into the coil when you press the fogging trigger.

Fuel Valve

The fuel valve is usually located near the propane gas cylinder and regulates the gas supply. You have to open this fuel valve to allow gas to flow from the cylinder to the burner and coil. After the fogging process, you must close the fuel valve to stop the gas supply. This would be the equivalent of turning the fogger off.

Coil, Spray Nozzle, and Coil Basket

This is the part of the fogger that is responsible for turning the liquid into a fog. It consists of a coil, burner, spray nozzle, and coil basket. These parts are in the front of the fogger.

The liquid flows through the burner and the heated coil. This is where it gets heated before spraying out through the nozzle. There is a wire basket around the coil to protect it. This basket also protects the person operating the fogger, keeping them from touching the coil as it can get extremely hot.

At the end of the coil is a spray tip. This is where the insecticide fog exits the fogger. If the fogger has an ignition trigger, there might be an igniter hole under the coil.

Be careful when using a fogger as the coil, basket, and spray nozzle will get very hot. These can cause burns if touched.

Propane Gas Cylinder

Some thermal foggers use different gases for heating. This thermal fogger uses propane gas to heat the burner and coil. You must attach the propane cylinder to the back of the body of the fogger. Most propane foggers come without a propane gas cylinder, so you have to buy it separately. The size of the propane gas cylinder is usually indicated by the manufacturer of the fogger.


Propane thermal foggers are a great tool for pest control. It’s important to know the components of your fogger before using it for safety reasons. Make sure that you read the instructions that come with your fogger before using it since no two foggers will be exactly the same. It’s always better to be safe than sorry!

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