Watsco, Inc. engages in distribution of air conditioning, heating and refrigeration equipment and related parts. Its products include residential central air conditioners, gas, electric & oil furnaces, commercial air conditioning & heating equipment, and other specialized equipment, parts, including replacement compressors, evaporator coils, motors and other component parts; and supplies, including thermostats, insulation material, refrigerants, ductwork, grills, registers, sheet metal, tools, copper tubing, concrete pads, tape, adhesives, and other ancillary supplies. Read More The company was founded by William Wagner in 1956 and is headquartered in Miami, FL. The listed name for WSO.B is Watsco, Inc. Class B.