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Air Scrubbers in Restoration: What They Do and Why

Last updated October 25, 2026

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The short answer

How Air Scrubbers Work

Air scrubbers work by drawing in contaminated air and passing it through a series of filters. The most common type uses a HEPA filter to capture fine particles, such as mold spores, dust, and soot. Some units also include activated carbon filters to absorb odors and volatile organic compounds, or VOCs, from materials like wet drywall or carpet.

The cleaned air is then recirculated back into the room. This process is called negative air pressure when the scrubber vents outside, which helps contain contaminants to the work area. In simpler terms, the machine acts like a powerful vacuum for the air, continuously cycling the room's air through the filters until the air is cleaner.

Why Use Air Scrubbers in Restoration

After water damage, your home's air can hold mold spores, bacteria, and chemical odors from damp materials. Air scrubbers help reduce these airborne particles, making the space safer for you and for anyone working on the cleanup. They also help dry out the air by removing moisture, which can speed up the drying process for wet walls and floors.

Air scrubbers are especially useful in areas where you cannot open windows, such as a basement or a room with no ventilation. They also help contain dust and debris during demolition or cleaning, so that particles do not spread to other parts of your home. For this reason, pros often run them during and after a restoration project.

  • Reduces airborne mold spores and bacteria
  • Helps control odors from wet materials
  • Supports drying by removing moisture from the air
  • Contains dust and debris during cleanup
  • Works in rooms without windows or ventilation

What Air Scrubbers Do Not Do

Air scrubbers are not a substitute for fixing the source of water damage. They do not dry out saturated materials like soaked drywall or carpet. They also do not remove mold that is already growing on surfaces; that requires physical cleaning and removal. Think of an air scrubber as a helper for air quality, not a solution for the damage itself.

Also, air scrubbers do not eliminate all odors. Some odors may be trapped in porous materials, and the machine only filters the air, not the source. For persistent smells, you may need to remove and replace affected materials. The pros will often combine air scrubbing with other methods, such as dehumidifiers and proper drying, for a complete approach.

When You Might Need an Air Scrubber

You might need an air scrubber if your home has had significant water damage, especially if flooding involved sewage or contaminated water. They are also useful after a fire, to remove smoke particles and odors, though fire damage requires a specialized fire restoration professional. If you have mold growth visible or a musty smell, an air scrubber can help while you address the mold.

For minor spills or a small leak that you dry quickly, an air scrubber may not be necessary. The key is the extent of the damage and the level of contamination. If you are unsure, a local water damage pro can assess the situation and recommend the right equipment. Knowing your options helps you make an informed decision.

Renting or Buying an Air Scrubber

You can rent air scrubbers from equipment rental stores or purchase them from home improvement centers. Renting is often a good choice for a one-time restoration project, since the cost depends on the rental period and the machine's size. Buying makes sense if you expect to use it repeatedly, such as for ongoing renovations or if you own rental properties.

The cost to rent or buy varies widely, often from $50 to $150 per day for rental, but it depends on the machine's capacity and where you get it. If you hire a water damage restoration pro, they may include air scrubbers as part of their equipment. Before you decide, check with your insurance company about coverage for equipment rental, as policies vary, and your insurer decides what is covered.

Water damage does not wait

Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

How long should an air scrubber run after water damage?

There is no set time, as it depends on the extent of the damage and the size of the area. In general, you might run it for several days, continuously, until the air smells clean and testing shows no elevated particle levels. A professional can advise you based on your specific situation.

Can an air scrubber remove mold from the air?

Yes, a HEPA-equipped air scrubber can capture mold spores from the air, reducing the number you breathe. However, it does not kill mold or remove it from surfaces. You still need to clean and remove mold growth to prevent it from becoming airborne again.

Is an air scrubber the same as a dehumidifier?

No, they serve different purposes. A dehumidifier removes moisture from the air, while an air scrubber filters particles and odors. Both can be used together in water damage restoration: the dehumidifier speeds drying, and the air scrubber cleans the air. Some machines combine both functions, but they are not the same.

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