Air duct cleaning services; Electric appliance installation and repair; Electrical repairs and installation of home appliances; Furnace installation and repair; Heating equipment installation and repair; HVAC contractor services; Installation and repair of air conditioning apparatus; Installation and repair of heating, ventilating and air conditioning equipment; Installation and replacement service for heating, ventilating and air conditioning systems; Installation and replacement service for water heaters; Installation of building insulation; Installation of environmentally compliant HVACR, hot water heaters, humidifiers, thermostats, furnaces, boilers, air conditioners, heat pumps equipment; Installation of insulating materials; Installation, repair and maintenance of heating equipment; Maintenance and repair of heating installations; Maintenance of building equipment; Plumbing; Plumbing and gas and water installation; Plumbing contractor services; Plumbing services; Repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems