Air conditioning apparatus cleaning services; Air conditioning contractor services; Air conditioning vent sealing services; Air-conditioning apparatus washing services; Installation of air-conditioning apparatus; Installation of air-conditioning apparatus for use in clean rooms; Installation of air-conditioning systems; Installation of heating, refrigerating, air-conditioning, drying, ventilating and dust extraction apparatus; Installation of heating, ventilation and air-conditioning systems; Installation and repair of air-conditioning apparatus; Installation and repair of air-conditioning systems; Installation and repair of heating, ventilating and air-conditioning systems; Installation, maintenance and repair of air-conditioning apparatus; Installation, maintenance and repair of air-conditioning systems; Installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments; General contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; Installation and replacement service for heating, ventilating and air conditioning systems