A warm welcome from Norm and Sons, Inc. We're a full-service sheet metal, duct and HVAC company serving commercial, industrial and residential customers in Nassau, Western Suffolk and Queens counties. For over 50 years, our name has stood for outstanding quality and reliability. In addition to expert fabrication of ductwork and sheet metal products, we design and install complete, heating, air-conditioning and ventilation systems in businesses, office buildings, homes and more. Consider us for all your climate control or ventilation needs and discover why we're a real breath of fresh air.