Airpura Industries V600 Air Purifier Capable of removing over 4000 chemicals, Color Black Ideal for commercial or industrial areas - effective for up to 2000 square feet 18 lbs of enhanced, activated carbon removes over 4000 chemicals 3 Step Filtration: Pre-Filters, Carbon filters, HEPA filters Felt gaskets and steel housing produces no off-gassing Micro-Suppress filters eliminate bacteria and viruses