How Does Fogging Machine Work & How to Use

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A liquid, like glycol or liquid nitrogen, is typically used in a fluid-based fogger machine. In order to create vapour, it warms the mixture. After mixing with cool air to create a dense fog, the vapour then escapes through the nozzle.

Pros & Cons of Fogging Machine


  1. You can purchase a fluid-based fog machine for a little less money because you won’t need as much of the liquid because it doesn’t deteriorate or lose volume like dry ice.
  2. The majority of liquid-based foggers can produce more fog than dry ice and are portable. There is therefore more fog per volume of liquid.


  1. It’s more challenging to clean up after using many liquid fogger machines. The chemicals in the liquid could cause the fog to stick. Maybe even some stains come off. A liquid fogger requires expensive maintenance, so be prepared to carry a sizable wallet.
  2. It’s not always safe to use liquid vapour. Although it’s typically regarded as safe, a liquid-based fogger isn’t for you if you have an allergy to it.

How Does Fogging Machine Work Work

Dry Ice Fog

The formation of fog occurs when dry ice is dropped into warm water, where the frozen carbon dioxide (dry ice) sublimates into cold carbon dioxide gas and mixes with the humid air. (For those who have forgotten their high school science, sublimation is the process by which a solid instantly transforms into a gas without first going through a liquid state.)

Fluid-base Fog Machines

Most fluid-based fog machines today operate by quickly heating a water and glycol mixture to create a vapor. A nozzle forces the expanding vapor out into the cooler air where it condenses into fog due to the warm, moist vapor mixing with it.

Fog Machine Uses

More often than you may realize, fog machines are used. In fact, without fog machines, some industries simply cannot exist. People use them for their own purposes at events like Halloween parties, concerts, and events. However, let’s focus on how fog machines are used in industry.

Entertainment and Movie Industry

How often have you seen a dramatic movie scene with a light mist covering it? Does this not heighten the tension and excitement? A fogger machine created the mist that you see.

Because they are aware of how fog can alter audience perception, many filmmakers employ various smoke and fog machines in their productions. Consider the absence of fog effects in a horror film, for instance. You probably won’t experience as many jumpscares.

Theatre Industry

The stage is the most significant component of the theater. The audience can clearly see what is happening on stage in this industry because the stage is well-lit and there is just enough fog.

Fog machines improve visual effects and make theater much more enjoyable, whether it’s in Shakespeare plays or Cirque du Soleil productions. You’re starting to notice the little details that go into a play or stage performance and contribute to its amazing quality.

Live Concerts

Ever attend a concert? What must the performer do in order to set the scene for their performance? They do indeed require fog, you are correct.

A fog machine will undoubtedly be present at a concert or other live event. The men in charge of the fog effects are skilled experts in the area. Maintaining the ideal liquid concentration and fog density for the audience is their responsibility.

Again, fog improves the experience. Fog helps create light effects that, like in a theater, bring a performance to life in front of your eyes.

2. How Does Fogging Machine Work2

Firefighting Training Exercises

Firefighters are wonderful people, but did you know they train with foggers? There is a deadly fog that appears when there is a fire. With the aid of a fog machine, these courageous individuals can practice saving people in low visibility.

Firefighters can better prepare for an actual situation by having a pre-experience with this smoke, which helps them understand how it might feel. Fog machines are therefore used in firefighting training exercises to aid firefighters in perspective-taking and improve their ability to react to actual situations.

Pest Control Industry

Everyone is aware of how annoying pests can be. If you’re tired of a pest infestation, fumigation machines can be your best friend. The good news is that the fog can suffocate those annoying pests by penetrating every nook and cranny. It significantly simplifies the task.

Typically, ultra-low volume, or ULV, fogging is used to control pests. You won’t encounter a dense, heavy fog here. Who really cares about aesthetics in this situation? An extended period of low-density fog will be produced instead by the ULV fogger. They have no chance of understanding what hit them.

Sanitising & Disinfecting

Everyone is on high alert in the wake of the COVID-19 disaster. People practically always have hand sanitizers available, whether inside or outside their homes, and they always have masks and gloves on.

However, liquid sanitization is not very effective. Your breathing air can’t be cleaned by it, right? How should your room or office be cleaned or disinfected? Which response do you believe the majority of people would choose? You read that right—a fog machine.

A fogger is the only piece of equipment that effectively kills bacteria and germs. This is so that you are only able to protect your hands when using a hand sanitizer.

What is the Difference Between a Fog Machine and a Haze Machine?

Similar to a fog machine, a haze machine also creates fog, but the vapor droplets that the fog machine creates are larger than the particles that the haze machine creates. A haze that disperses well and hangs around in the air for a considerable amount of time is produced by the haze machine using tiny vapor particles with a diameter of about a micrometer. It is challenging to see the haze particles in normal lighting because of their small size. It produces the best effect when light beams are used because the light is reflected back from the tiny fog particles and makes the light beam’s path visible.

A heating element is not always present in haze machines, though some do use heat exchangers like foggers. Haze generators with heat exchangers are merely foggers with a fan added to thin and disperse the vapor more. Without a heating element, haze machines can produce fine vapor right away without the need for a warm-up period. This device uses an air compressor to atomize the liquid and produce extremely tiny vapor particles rather than a heating element. Due to friction with the air particles, a liquid that is in contact with fast-moving air separates into small particles.

How Does a Low-lying Fog Machine Work?

Low-lying fog generators create thick fog that floats close to the ground. It gives the impression of floating above the clouds. Because it is cooler than the surrounding air, this fog does not rise and does not spread easily. Before leaving the machine, the vapor is typically cooled with ice. This machine, which has a vapor cooling chamber added, is very similar to a standard fog machine, as shown in the image below.

One of the oldest low fog machines creates fog using carbon dioxide (dry ice). Dry ice is said to sublimate because it goes directly from a solid to a gas, existing in a gaseous state at normal pressure and room temperature. Above the hot water reservoir on this machine is a dry ice basket. The water vapor in the air above the hot water condenses into a heavy and dense white fog when it comes into contact with carbon dioxide.

Without ice or carbon dioxide, dense low-lying fog can also be produced. Ice does not even need to be used to cool the vapor in fog machines that atomize water using high-frequency waves because the vapor is already cool. The water tank of these machines contains piezoelectric discs. Water above the piezoelectric discs condenses into tiny droplets when they oscillate at a high frequency. This process is referred to as ultrasonic atomization. The cost of these machines is higher because fogging without ice and carbon dioxide is obviously much more convenient.

How Do I Use a Fog Machine?

  • Ensure you have all the required parts, the proper fluid (juice) for the fog machine, a cleaner, and, if wished for, a fog machine timer and remote control in step 1. Follow the instructions on your fog machine exactly.
  • Step 2: Test your fog machine before using it as part of your décor or at a party. By doing this, you’ll be able to precisely see the effect it’s having on your house and the other props. Additionally, you should test it beforehand to ensure that it functions correctly and that you are aware of the setup time. You’ll want to allow enough time for that because many machines need some time to warm up before they can start producing fog. Make sure the supplies you require, such as dry ice, are close by.
  • Step 3: Measure the amount of fog your machine produces so you can set it up where you want it. If you’re unsure of where to put your machine, test it out in a few locations to see which one looks the most eerie.
  • Step 4: If you’re using a timer or remote, set them up first so you know exactly how to use them.

How to Care for Your Fog Machine

We can’t stress this enough: Be sure to only use the proper kind of fog juice when operating your fog machine. You risk damaging the machine if you try to make your own or use something else in its place.

You should unplug your fog machine after using it so that it can cool down. Then, before adding the fog machine cleaner, be sure to completely empty the fog fluid. Run your fog machine once more until the cleaner is completely gone. The next time you use your fog machine, it will function perfectly and safely thanks to this. Make sure to run it through a test run if the instructions say to do so from time to time.


Most fog machines operate in conjunction with fog “juice” or fog fluid made up of a combination of water and glycol. The white fog that you see in the air is created when this mixture heats up.


Is a Fog Machine Bad for You?

Depending on what you put in a fog machine, it can be harmful to your health. Make sure to use propylene glycol rather than ethylene glycol when using a fluid-based machine because the latter is toxic.

A water and glycol solution would typically not be harmful unless the person already has respiratory or throat irritation. Avoid entering any man-made fog if that’s the case. Dry ice produces completely secure fog.

Can You Use a Fog Machine in the House?

A fog machine is indeed permissible inside the house. But the fog will cover everything in your home, and some of it might get trapped in your carpet. Therefore, there is a chance that the fogging machine will harm your carpet.

Additionally, if your home is equipped with a fire alarm system, make sure you speak with the installer because some detectors could set off a fire alarm if they were exposed to fog.

Do I Need Training to Use a Fogging Machine?

Yes, using a fog machine requires special training. But if you want to make fog without any experience, there are no international licensing organizations that can stop you from using one.

Before using a fogging machine, you should have either formal or informal training. In particular, if you’re using a fog machine for industrial purposes, it’s more crucial that you adhere to HSE requirements and keep up with the most recent standards.

Training is crucial because creating fog can put other people in danger. Before using the machine, make sure you have the necessary training. Use it only as directed!

What Makes the Fog in a Fog Machine?

If you’re using a fluid-based fog machine, it heats the water and glycol solution you’ve added, creating vapour in the process. Fog is created when the vapour meets the colder air outside after it leaves the machine’s nozzle.

The dry ice would turn into gas and condense the water vapour to form a dense fog if you had a dry ice fogging machine. Equivalent results are produced by liquid nitrogen.

Can We Use Sanitiser in a Fogging Machine?

It is possible to use a sanitizer in a fogging machine, but we advise hiring a specialist to do it instead. The amount of sanitizer in each fogging machine will differ because they are all unique.

Additionally, adding sanitizer to a fogging machine can be risky, especially if the substance is explosive or flammable. If it’s not, breathing in the incorrect concentration can harm your lungs.

Can Hydrogen Peroxide Be Used in a Fogger?

When used indoors, adding hydrogen peroxide to a fogger is completely safe and effective. However, once more, we urge you to check the concentrations beforehand, or better yet, have a professional do it for you.

Disinfection typically works best at a 3 percent concentration. Do exercise caution because hydrogen peroxide is a potent oxidizer that has the potential to ignite other materials.