Review on Bionaire True HEPA Air Purifier: Advanced 3-Stage Filtration System for Allergies & Pets, Quiet Settings, Medium Room, White by Kelly Kunkel

This air purifier really works, but spend more money up front and replacement filters don't cost that much. I have a small air purifier for my bedroom that is also round. I paid about $10 for two filters. When I finally found a replacement filter for the Bionaire on the Revain it was half the price of the machine to replace. So, when looking for an air purifier, don't just consider the cost of the machine. These are filters that you will pay for over time. When you buy a machine that uses a rectangular filter, you don't just have a choice between filters from different manufacturers. They sell for $15.00 on the expensive side or less. So pay more for the car and it will be cheaper in the long run to run it for years.