Last updated on October 13th, 2022

To efficiently capture allergens, gases, and other harmful particles in your crawl space an air purifier has to utilize a true HEPA filter. Below you find 3 air cleaners  that I consider the best to utilize in a crawl space.

Top 3 Air Purifiers for Crawl Space

If you don’t see the whole table, scroll it horizontally
Airmega 250
Coway Airmega 250 crawl space air purifier
BISSELL air320 Smart Air Purifier for crawl space
Afloia Q10 air purifier and dehumidifier
Under $350
Under $350
Under $150
930 sq. ft.
up to 1582 sq. ft.
270 sq. ft.
230 - 261 CFM
264 CFM
35 CFM
Filter Life
12 months
6 months
3 - 6 months
Filter Replacement
Auto Mode
Noise Levels
22 - 54 dB
37 - 59 dB
45 dB
Max Power
64 Watts
116 Watts
45 Watts

Coway Airmega 250 is a powerful HEPA air purifier manufactured by the Korean company Coway which has produced many high-quality air cleaners before, including the famous Coway Mighty. This air purifier utilizes the latest design developments to clean the air at maximum efficiency, utilizing a Max2 true HEPA filter to catch particles as small as 0.3 micron, including bacteria, allergens, and dust. In addition to the HEPA filter, the unit also features a pre-filter and Activated Carbon filter to remove large particles and odors respectively.

I recommend checking my review here, where I go into more details about this excellent Coway air cleaning system.

Bissell Air320 is one of the most popular and powerful Bissell air purifiers, as it can remove harmful contaminants and dust from spaces up to 1582 square feet. Same as the Airmega 250, it utilizes 3-stage air filtration with a pre-filter, medical-grade HEPA and Activated Carbon filters without releasing any ozone.

The Bissell Air320 is a sturdy, energy certified air cleaner that was tested by AHAM to remove dust, pollen and smoke. Its powerful fan can pull air from every side of your crawl space. Replacement filters are cheaper compared to the Coway Airmega, but they have to be replaced twice a year.

Afloia Q10 is an air cleaner for smaller houses that lack auto mode. However, it comes with a built-in dehumidifier, so you won’t have to spend extra if you need one. The filtration system includes a pre-filter, HEPA and Carbon filters and it can be used with or without dehumidifying function.

If your crawl space exceeds 270 square feet, you can simply get yet another Afloia Q10 air purifier, to cover the whole area.


How do I circulate air in my crawl space?

Air purifiers listed here are good at circulating air in the mentioned above space.

Will an air purifier remove musty smell in my crawl space ?

Air purifiers with a charcoal filter can do that.

Can I run an air purifier 24/7 in my crawl space?

Yes, it is not only possible but recommended.

Can I dehumidify a crawl space?

Yes! You either have to go with a combination of an air purifier and dehumidifier, or buy each separately. Click here to buy a powerful and sturdy dehumidifier that covers crawl spaces up to 4500 sq. ft.

What about an air purifier and humidifier combo for my crawl space?

Here’s a list of the best air purifier & humidifier combo.