AeraSmart PM2.5 smart sensors monitors the air quality and automatically adjusts the fan speed to keep air purified, moving and safe. Allergy protection with H13 True HEPA Filtration capturing up to 99.95% of particles as small as 0.1 microns, including allergens such as pollen, dust, and pet dander. Pre-filter removes visible airborne particles and carbon air filter actively removes pet and smoke odours, and volatile organic compounds.. Covers up to 1,500 square feet. CADR Rating - Dust - 486. CADR Rating - Pollen - 450. CADR Rating - Smoke - 517. 21.2 lb. 12-5/8"W x 12-5/8"D x 29-5/16"H. 3-year limited warranty. White.