7 Best Air Purifiers with Washable Permanent Filters (2021)
CHECK AMAZON PRICE. Envion Therapure TPP240 is an air purifier that removes not just smoke and allergens but also chemical gases, odor, germs, mold, viruses, and bacteria. It is quite suitable for big rooms (up to 500 square feet). This air purifier is quite affordable, as it comes with permanent HEPA filter – so you don’t have to replace filter every few months.