Watsco, Inc. is a distributor of air conditioning, heating and refrigeration equipment, and related parts and supplies (HVAC/R) in the HVAC/R distribution industry in North America. As of December 31, 2016, the Company sold a range of non-equipment products, representing more than 300,000 stock keeping units, including parts, ductwork, air movement products, insulation, tools, installation supplies, thermostats and air quality products. It distributes products consisting of equipment, including residential ducted and ductless air conditioners ranging from 1 to 5 tons, gas, electric and oil furnaces ranging from 50,000 to 150,000 British Thermal Units, commercial air conditioning and heating equipment and systems ranging from 1.5 to 25 tons and other specialized equipment; parts, including replacement compressors and motors, and supplies, including ductwork, grills, registers, sheet metal, adhesives and other ancillary supplies. It also sells products to the refrigeration market.