This was the second Alen purifier we have purchased, with my wife running a day care out of our house we thought it would be good to have the best air possible and after looking at other brands we ended up with Alen and have been happy with our decision.

We really like the different filter options and how long each filter lasts (roughly 9-11 months) between changes. It is also really nice to be able to automatically have the filters sent with a subscription on the frequency you choose.

Being able to clean off the prefilter is an added convenience also and helps the filters last longer.

We run ours 24/7/365 and when we did have an issue Allen was very quick to help by sending a replacement unit.