Comprehensive preventative maintenance service for roofing systems; HVAC contractor services; Installation and maintenance of solar energy based power plants; Installation and maintenance of solar thermal installations; Installation and maintenance of photovoltaic/solar thermal hybrid installations; Installation of HVAC systems; Installation of solar energy systems and alternative energy products for residential and commercial use; Installation of solar heating systems; Installation of roof gutters; Installation, maintenance and repair of solar collectors; Installation, maintenance and repair of solar energy systems; Installation, maintenance and repair of solar installations for generating power; Installation, maintenance and repair of solar installations for generating power, solar collectors and photovoltaic modules; Removal and reinstallation of solar panels; Repair of roofing; Roof maintenance services; Roofing consultation; Roofing contracting; Roofing installation; Roofing repair; Roofing services; Providing information relating to roofing installation and repair; Provision of information relating to roofing installation and repair