Alen Air Filter BF15A-Pure Replacement HEPA Filter for A375 & A350 Air Purifier - Captures Allergens, Dust, & Mold (1 Filter)

Great filter for a great machine. I've had 2 Allen A375's for over 10 years. This filter is durable, comes with a washable pre filter, and pulls the smoke particles from our woodstove out of the air nicely. Picks up our cats pet dander and fur too. Awesome filter. Pricey but worth it.

We own the old, perhaps "outdated" Alen Model A350. It's a pretty simple design: A squirrel-cage blower inside a box with a super-fine filter out front on its' input. A great product.And this filter really does its job well, filtering down to 3 tenths of a micron. My grandson's asthma near completely went away after using this filter.

Absolutely love our Alens. Have referred them to family, friends and clients and everyone loves them too! I wanted to share that I have this one in my teenagers bedroom next to her rat cage and guests who have stayed have said there’s no smell. It’s also important for rats to have clean air to breathe. Running this machine on low 24 hrs a day keeps the dust way down (except for above the filter, the wall and ceiling needs to be dusted periodically).

Am using it since i bought the purifier. So i know it's working good. 😄

works, but pricey.

Tried to buy "compatible" filters, but they came with a chemical smell. Stick with the original for the best quality and performance.

I have had an Alen 350 air purifier for ... more than 10 years. The filters always work. The purifier is still going strong. What a super investment, this was.

My Alen air filter has been running nonstop for several years now. I extend the life of the filter by vacuuming it periodically. It gets a lot of dust and creates a pleasant white noise in the bedroom that makes it easier to sleep. These filters seem to work just fine in it.