Have one at work. It's be very good so wanted one at home. Bought one for the living room and just ordered another for my bedroom. Also have Blue Aire purifiers. They're good as well. I have a lot of allergies so with all of these air purifiers running hopefully it will help my breathing. Lifesmart Large Room Medical Grade Air Purifier Club O Gold Members Earn Straight to your inbox 3 Year Platinum Protection Plan $47.99 2 Year Platinum Protection Plan $26.99 /  See all Lifesmart Air PurifiersBuilding a safe room or bomb shelter?We have everything you need right here NBC Air Filtration Systems American Safe Room designs and manufactures all of the critical components you need to construct a Nuclear, Biological, and Chemical resistant safe room.Since 2001 we have sold thousands of Safe Cell NBC air filtration system, blast doors, blast hatches, and bomb shelter kits. They are in use right now in underground bunkers, safe rooms, nuclear power plants, chemical plants, and other industrial applications.