Air Filter Sales has been supplying industrial, commercial, medical and preservation facilities as well as residential dwellings with the best replacement air filters available since 1984. Based in Haverhill, Massachusetts, our air filter experts have been providing business owners, contractors and homeowners with unmatched customer service and a large inventory of premium HVAC filter and belt replacement products. From manufacturing plants to corporate offices and medical facilities, quality of air is critical across all industries. Our state-of-the-art facility carries a wide selection of air filter and belt replacements. We also carry products that can assist in LEED certification as well as HEPA filters for clean room installations.