Air conditioning contractor services; Air duct cleaning services; Consulting services in the field of construction of wind energy facilities; 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 maintenance of photovoltaic/solar thermal hybrid installations; Installation and maintenance of solar thermal installations; 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 of solar energy systems and alternative energy products for residential and commercial use; Installation, repair and maintenance of heating equipment; 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 services for electric generators and wind turbines