Rabbit Air BioGS (model 421A - covers 600 sq. ft.) High Quality Ultra-Quiet Air Purifier - Low Maintenance - Washable Filters! Amazon A-to-Z Purchase Protection & RabbitAir No-Hassle Return Policy - Super Fast Shipping BioGS HEPA filter technology with washable pre-filter and activated carbon filter Room coverage up to 600 sq. ft. Zero Ozone Emmissions 5 Year Warranty (Parts and Labor) and 24/7 Technical Support