Air conditioning apparatus cleaning services; Air conditioning apparatus installation and repair; Air conditioning contractor services; Air conditioning vent sealing services; Boiler cleaning and repair; Contractor services, namely, review of and remedial recommendations for building plumbing, electrical and mechanical systems for others; Drain and sewer cleaning and rootering services; Drain cleaning services; Furnace installation and repair; Heating contractor services; Heating equipment installation and repair; HVAC contractor services; Plumbing; Plumbing and gas and water installation; Plumbing contractor services; Plumbing installation advisory services; Plumbing maintenance advisory services; Plumbing services; Electrical contractor services; General contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing 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, repair and maintenance of heating equipment; Installation and replacement service for water heaters; Installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes; Maintenance and repair of heating installations; Mechanical 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; Repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems; Repair or maintenance of air-conditioning apparatus; Repair or maintenance of boilers; Repair or maintenance of industrial furnaces