This hepa filter came right in time! There are major renovations occurring in my apartment for mold and my cheap landlord would not set us up in another unit so we are living amidst some unsavory air quality. I wasted no time hooking this unit up when it arrived and was pleased so see that the air was less heavy and more breathable within an hour. I was also happy to find that it is capable of filtering mold spores when I researched the product. I'm thinking about purchasing another unit to cover the space of the entire apartment. I'm highly allergic to mold and am grateful that I could get this filter in exchange for a review.