Make the most of your BISSELL MYair™ personal air purifier by replacing the filter every 3 months. Regularly replacing your machine's genuine BISSELL replacement filter means your air purifier can continue capturing pollen, dust, pet dander, odors, and VOCs in the air. BISSELL® proudly supports BISSELL Pet Foundation® and its mission to help save homeless pets. When you buy a BISSELL product, you help save pets, too. We’re proud to design products that help make pet messes, odors and pet homelessness disappear.