Air-conditioning apparatus and installations; Air-conditioning installations; Air conditioning apparatus and installations; Air conditioning installations; Heating installations; Water filtration and purification units and replacement cartridges and filters therefor; Water purification and filtration apparatus; Water purification installations; Water softening apparatus and installations; Water filtration and purification units and replacement cartridges and filters therefor; Water purification and filtration apparatus; Water treatment equipment, namely, water filtration units; Water treatment equipment, namely, water filtration units and reverse osmosis units; Water treatment equipment, namely, cartridge filtration units; Hot water heating installations; Installations for conditioning air

Air conditioning apparatus installation and repair; Air conditioning contractor services; Air conditioning vent sealing services; Boiler cleaning and repair; Drain and sewer cleaning and rootering services; Drain cleaning services; Electrical contracting; Electrical contractor services; Electrical repairs, maintenance, and installation of electrical wiring, outlets, light fixtures, and electrical panels; Heating contractor services; Heating equipment installation and repair; Installation and repair of heating, ventilating and air conditioning equipment; Installation, repair and maintenance of heating equipment; Plumbing; Plumbing and gas and water installation; Plumbing contractor services; Plumbing installation advisory services; Plumbing maintenance advisory services; Plumbing repair advisory services; Plumbing services; Repair or maintenance of water purifying apparatus; Repair or maintenance of electric lighting apparatus; Water main rehabilitation services; Comprehensive preventative maintenance service for electrical systems; Contractor services, namely, review of and remedial recommendations for building plumbing, electrical and mechanical systems for others; Installation and repair of air conditioning apparatus; Installation and replacement service for water heaters; Installation and replacement service for heating, ventilating and air conditioning systems; Maintenance and repair of heating installations; Repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems; Repair or maintenance of boilers; Repair or maintenance of gas water heaters