Pewaukee, WI-based Gustave A. Larson Co. celebrated its 70th anniversary in July. The company has been family owned and operated since Gus Larson founded it in 1936. It began as a small storefront in Madison, WI, with just two employees. Today, Larson has 44 locations in 14 states with about 400 employees. Each branch carries an extensive inventory of HVACR equipment and replacement parts to serve customers' needs.