Airpura Industries H600 Air Purifier Designed for large-scale allergen particle filtration Cleans up to 2,000 square feet 40 square feet of true HEPA material to remove 99.97% of allergens 0.3 microns and larger Delivers more CFMs than any other home air purifier available - 560 cubic feet of air per minute All metal housing, no plastic, rubber, silicone, or adhesives used, which means no offgassing