lighting fixtures; light bulbs; central heating boilers; air valves for steam heating installations; heat generators; steam generators; steam generating installations; Baking ovens; cooking stoves; refrigerators; freezers; laundry drying machines; commercial dryers and warewashers sold as a unit for washing and drying food plates, bowls, pots, pans and food preparation and cookwares, glasses and utensils; energy recovery ventilators; ventilating exhaust fans; faucets; regulating accessories f...