I own 2 Air Doctors now and my recent purchase is my second. Besides I won one for my Dad and a grown daughter owns one as I advised. I bought this purifier recently and it helped with stale air in my basement. I am very glad to have it!
We live in Oregon the pollen this time of year is crazy! This has helped so much! I love that it is so quiet I can put it in my bedroom and have no problem sleeping with it on.