Freezing equipment installation and repair; Furnace installation and repair; Heating equipment installation and repair; Installation and maintenance of irrigation systems; Installation and repair of air conditioning apparatus; Installation and repair of freezing apparatus; Installation and replacement service for heating, ventilating and air conditioning systems; Installation and replacement service for water heaters; Installation and repair of heating, ventilating and air conditioning equipment; Installation, maintenance and repair of drain systems, waste water systems, sewer systems, septic systems, leach fields and vent systems for the same; Installation, repair and replacement of heating, cooling, refrigeration and ventilation equipment; Installation, repair and maintenance of heating equipment; Irrigation devices installation and repair; Maintenance and repair of heating installations; Plumbing services; Plumbing and gas and water installation; Plumbing contractor services; Plumbing installation advisory services; Plumbing maintenance advisory services; Plumbing repair advisory services; Air conditioning apparatus installation and repair; Repair or maintenance of gas water heaters