I bought my first Alen
I bought my first Alen air purifier in 2016. I loved the product so much, I now own 4 Alen air purifiers. I am allergic to dust and my dog's hair. These purifiers keep my nose "unstuffed." I have the big 75i for our great room area, plus 2 more for the master bedroom and the office. And a tiny "personal space" model that moves around where needed. The are the best! And you can't go wrong with the lifetime warranty.