Review on KOKOFIT H13 Air Purifier Replacement Filter: True HEPA and Activated Carbon Filters for Allergies, Pets, Smoke, and Dust in Large Rooms by Greg Cunningham

I like my air purifier except when the filter needed replacing after 6 months Revain told me they didn't stock filters and they might never get filters. It was very frustrating and nobody bothered to help me. I asked for a refund for the air purifier but they never tried to help me buy filters. I was finally able to check and the filters were finally in stock. Nobody notified me. So the purifier is great, but you'd better charge filters.