Air conditioning apparatus cleaning services; Air conditioning contractor services; Air-conditioning system installation and repair; Heating contractor services; Heating equipment installation and repair; General contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; Installation and maintenance of heating systems; Installation and repair of heating, ventilating and air-conditioning systems; Installation and repair of heating, ventilating and air conditioning equipment; Installation of air-conditioning apparatus for use in clean rooms; Installation of air-conditioning systems; Installation of heating equipment; Installation of heating systems; Installation of heating and cooling apparatus; Installation of heating, refrigerating, air-conditioning, drying, ventilating and dust extraction apparatus; Installation of heating, ventilation and air-conditioning systems; Installation of solar heating systems; Installation, maintenance and repair of air-conditioning systems; Installation, maintenance and repair of fire, smoke and heat alarms; Maintenance and repair of heating installations; Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; Repair and maintenance of air-conditioning apparatus; Repair of air-conditioning apparatus; Repair of compressed air machines