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What Is an Ozone Treatment and Does It Remove Fire Odor?

Last updated October 26, 2026

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The short answer

How Ozone Treatment Works

Ozone treatment is a process where a generator produces ozone gas, a reactive form of oxygen. The gas circulates through the affected space and chemically reacts with odor-causing particles, breaking them down. This can neutralize many smells, including smoke odor from a fire, without leaving a chemical residue behind.

  • Ozone gas oxidizes odor molecules in the air and on surfaces.
  • It can penetrate fabrics, carpets, and open wall spaces.
  • Treatment requires sealing the room and running the machine for hours.
  • People and pets should stay out of the area during treatment.
  • Ozone works well after soot and ash are cleaned away.
  • Heavy smoke damage may need material replacement, not just deodorizing.

Does Ozone Remove Fire Odor Completely

Ozone can remove fire odor, but complete removal depends on several factors. The type of fire, the materials burned, and how long the smoke lingered all affect the outcome. For instance, a small kitchen fire may respond well to ozone treatment, while a house fire that soaked smoke into drywall and insulation might not be fully deodorized.

If smoke has penetrated deeply into porous materials like drywall, wood, or upholstery, ozone alone may not be enough. The pros often need to clean surfaces, seal or replace porous materials, and then use ozone as a final step. You should expect that some items, especially heavily smoke-damaged ones, may need to be thrown away.

Safety Concerns with Ozone

Ozone is a powerful oxidizer, and high levels can irritate your lungs, throat, and eyes. You should not stay in a room while an ozone machine is running. The pros will set up the equipment and then leave the space sealed until the treatment cycle is complete, which can take several hours or overnight.

After treatment, the ozone gas breaks down into normal oxygen, so it is safe to re-enter once the machine is off and the room is aired out. If you have asthma or other breathing conditions, talk to your doctor before using ozone in your home. Also, ozone can damage some materials like rubber, certain plastics, and electronics, so the pros will protect or remove those items beforehand.

When to Call in the Pros

Fire odor cleanup is not a simple DIY task, especially if the fire was large or the smoke spread through the whole house. The pros have industrial ozone generators and the training to use them safely. They also know how to combine ozone with other cleaning methods for a thorough job.

You should consider calling the pros if the smoke odor is strong, if it has soaked into walls or carpets, or if you have health concerns. They can also help with water damage from firefighting efforts, such as wet drywall or soaked flooring. In Virginia Beach, where humidity is high, lingering moisture can make odors worse and lead to mold growth.

A professional assessment can tell you what is salvageable and what needs to be removed. They will also clean or replace materials as needed. Ozone treatment is one part of a complete fire damage restoration process, not a cure-all.

  • Strong or widespread smoke odor needs professional equipment.
  • The pros combine ozone with deep cleaning of soot and residue.
  • Firefighting water damage often needs drying and mold prevention.
  • A pro can assess which items are salvageable and which are not.
  • Ozone machines for home use may be less powerful than industrial ones.

What to Do Before Ozone Treatment

Before the pros start, you can take some steps to help the process. Open windows to air out the space if it is safe. Remove loose soot from surfaces with a dry sponge or cloth, but do not use water, as it can make the odor worse by spreading the smoke residue. Also, remove any items that are heavily damaged and cannot be cleaned.

Make sure the pros have access to all affected rooms, including closets, attics, and crawl spaces. If you have pets, plan to keep them out of the home during treatment. You should also tell the pros about any medical conditions that might affect how you respond to ozone.

Finally, ask the pros about the expected duration of the treatment and what you need to do afterward, such as airing out the space. This will help you know what to expect and how to prepare your home for the process.

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Frequently asked questions

How long does ozone treatment take?

Ozone treatment typically takes several hours to a full day, depending on the size of the space and the severity of the odor. The machine runs continuously while the room is sealed. After that, you may need to air out the space for a few hours before it is safe to re-enter.

Is ozone treatment safe for my belongings?

Ozone can damage some materials, such as rubber, certain plastics, and electronics. The pros will usually remove or protect these items before starting. Fabrics and wood are generally safe, but heavily smoke-damaged items may still need to be replaced. Ask the pros to check your belongings beforehand.

Can I do ozone treatment myself?

Small ozone generators are sold for home use, but they are less powerful and may not fully remove fire odor. You also need to take safety precautions, such as leaving the room and protecting pets. For significant smoke damage, professional equipment and experience are more effective and safer.

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