W.F. Hann & Sons provides residential heating, cooling and plumbing services to residential and commercial customers in northeast Ohio. It provides single-source contracting in heating, ventilation and air conditioning maintenance, repairs, upgrades and retrofit services, plumbing, sheet metal fabrication, controls, ventilation and refrigeration. It services all makes and models of residential and commercial equipment. It provides a full range of plumbing services, such as hot water tank replacement, clogged drains, sewer cleaning, fixture replacements and garbage disposal repairs. It also sells replacement air filters and humidifier panels. Founded in 1907, its Web site provides simple information, answers questions and directs customers to people who can solve queries. It has more than 100 trucks and service technicians to service, install, repair and upgrade heating, cooling and plumbing systems and equipment.