watsco, inc. (nyse:wso) is the largest distributor of heating, air conditioning, and refrigeration (hvac/r) products with 507 locations in 36 states, puerto rico, latin america and the caribbean. founded more than 50 years ago as a manufacturer of parts and components for hvac/r equipment, watsco entered the distribution segment in 1989 and has become the industry leader with sales of $2.0 billion in 2009. watsco has 4,000 employees assisting over 50,000 contractors who, in turn, service, repair or replace hvac/r systems. watsco meets contractor’s needs by supplying the products required for the four major industry segments: air conditioners, furnaces and related parts (50%) air movement products, including ductwork and insulation (25%) controls, including thermostats and air treatment systems (15%) refrigeration products (10%)