Air Filter Basics

Can an Air Filter Help Homes with Mold Spores? Yes—Here’s How

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An image showing a cutaway diagram of a HEPA filter system trapping microscopic mold spores. Three supplementary panels visually demonstrate that the filter captures spores, reduces their airborne concentration, and improves indoor air quality.

If you’ve noticed a musty smell or spotted mold in your home, your HVAC filter can be a powerful first line of defense — but only if you choose the right one. Most standard filters let mold spores pass right through. In our hands-on testing, we’ve found that filters rated MERV 8 and above capture … Read more