Holmes HAPF30-U4 Replace Filter

Does the job. Small size fills with allergens much faster than a large unit. For the small size it works great but plan on replacing every 90 days if you use your unit constantly.

I bought my first Holmes HEPA air filtering machine more than a decade ago, and have been satisfied enough not to have bought any other brand since then, although I have had four Holmes air filter machines since then.

The first model I bought (I think it was the 220) is apparently discontinued, but it would be no exageration to call it a life-saver. I bought my first one because I lived in a house with a HEAVY chain smoker. Even though rated for only a single small room, that little sucker grabbed enormous amounts of smoke and the white paper on the filter blackened within weeks from particulate cancer-causing material which it saved me from inhaling. The next two filter machines I bought for a house which was infested with black mold. The one closest to the worst mold area blackened very quickly, while the second one, further from the mold, only grayed somewhat in the same time period -- the filter was very obviously cleaning potentially deadly black mold spores from...Read more

This Holmes filter was exactly what I needed for my air purifier. I use my machine daily & I recently couldn't find the filter in any local stores. It works wonderfully.