Find a fresher way forward with the Bionaire® True HEPA 360° Air Filter. Compatible with Bionaire True HEPA 360° UV Air Purifier (model BAP0041UVWH), this air filter features a 3-stage filtration system to capture up to 99.97% of airborne particles. The 3-stage filtration system captures unwanted dust, smoke, pollen, mold spores, and pet dander to deliver pure, crisp air. It starts with a pre-filter that captures large particles like hair and dust. Next, the True HEPA filter eliminates up to 99.97% of particles as small as 0.3 microns (the size of smoke particle). The carbon filter keeps your air clean and odor-free. For the best results, change the air filter in your Bionaire air purifier every 8-12 months. Package includes 1 genuine Bionaire True HEPA 360° air purifier filter.