HVAC contractor services; HVAC duct cleaning services; Installation of HVAC systems; Installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems; Consultancy relating to the installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems; Repair or maintenance of gas water heaters; Maintenance and repair of heating installations; Heating contractor services; Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; General contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; Heating equipment installation and repair; Installation and replacement service for water heaters; Repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems; Installation and repair of heating, ventilating and air conditioning equipment; Repair of heating apparatus; Installation and repair of floor heating apparatus; Installation of heating equipment; Installation, maintenance and repair of fire, smoke and heat alarms; Installation, maintenance and repair of fire, smoke and heat detectors; Installation and repair of heating, ventilating and air-conditioning systems; Providing information relating to the repair or maintenance of gas water heaters; Installation of heating, refrigerating, air-conditioning, drying, ventilating and dust extraction apparatus; Installation of heating, ventilation and air-conditioning systems; Installation, maintenance and repair of heating apparatus; Advisory services relating to the installation of heating and cooling apparatus; Installation and maintenance of heating systems; Heating equipment installation; Provision of information relating to the repair or maintenance of gas water heaters; Repair and maintenance of heating apparatus; Repair and maintenance of heating, refrigerating, air-conditioning, drying, ventilating and dust extraction apparatus; Installation of heating systems; Installation of heating apparatus; Installation, maintenance and repair of heating systems; Maintenance and repair of heating apparatus; Maintenance and repair of heating, refrigerating, air-conditioning, drying, ventilating and dust extraction apparatus; Installation and repair of heating equipment; Installation of solar heating systems; Installation, repair and maintenance of heating equipment; Installation of heating and cooling apparatus; Installation of ventilating apparatus; Installation and replacement service for heating, ventilating and air conditioning systems; Installation of ventilation and dust extraction systems; Repair and maintenance of ventilating apparatus; Maintenance and repair of ventilating apparatus; Installation, maintenance and repair of mechanically operated apparatus for opening and closing ventilation flaps; Installation, maintenance and repair of mechanically operated apparatus for opening and closing windows, fanlights, skylights and ventilation flaps; Installation, maintenance and repair of ventilating systems; Installation, maintenance and repair of ventilating apparatus; Installation, maintenance and repair of automatic apparatus for opening and closing ventilation flaps; Installation, maintenance and repair of automatic apparatus for opening and closing windows, fanlights, skylights and ventilation flaps; Air conditioning vent sealing services; Dryer vent cleaning services; Installation and repair of air conditioning apparatus; Repair or maintenance of air-conditioning apparatus; Air duct cleaning services; Air conditioning contractor services; Air conditioning apparatus cleaning services; Installation and repair of air-conditioning apparatus; Repair of air filtering apparatus; Air conditioning apparatus installation and repair; Air-conditioning apparatus washing services; Repair of intake air filters and parts thereof; Repair of air filters and parts thereof; Repair of intake air filters for machinery; Repair and maintenance of air-conditioning apparatus; Maintenance and repair of air-conditioning apparatus; Repair of air filters; Repair of air-conditioning apparatus; Provision of information relating to the repair or maintenance of air-conditioning apparatus; Installation of air-conditioning apparatus for use in clean rooms; Installation of air-conditioning systems; Installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments; Installation of air-conditioning apparatus; Installation, maintenance and repair of air analysis apparatus; Installation, maintenance and repair of air blowers; Installation, maintenance and repair of air pumps; Installation, maintenance and repair of air filters; Air-conditioning system installation and repair; Installation, maintenance and repair of air purifying apparatus; Installation, maintenance and repair of air-conditioning apparatus; Installation, maintenance and repair of air-conditioning systems; Installation and repair of air-conditioning systems; Providing information relating to the repair or maintenance of air-conditioning apparatus; Repair of air conditioners; Maintenance of air conditioners; Installation of direct air capture (DAC) carbon dioxide (CO2) extraction systems; Maintenance of direct air capture (DAC) carbon dioxide (CO2) extraction systems; Installation and repair of heaters for baths; Furnace installation and repair; Installation and repair of furnaces; Provision of information relating to the repair and maintenance of furnaces; Providing information relating to the repair and maintenance of furnaces; Installation and repair of freezing apparatus; Repair or maintenance of freezing machines and apparatus; Freezing equipment installation and repair; Providing information relating to the repair or maintenance of freezing machines and apparatus; Provision of information relating to the repair or maintenance of freezing machines and apparatus; Installation and repair of freezing equipment; Installation of refrigerating apparatus; Installation, maintenance and repair of refrigerating apparatus; Maintenance and repair of refrigerating apparatus; Repair and maintenance of refrigerating apparatus; Repair of refrigerators; Refrigerator repair services; Refrigerator repair; Installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes; Maintenance, servicing, and repair of air compressors