Trades contractor services, plumbing, heating and air conditioning, electrical, and low voltage wiring and equipment installation, repair and maintenance of home appliances, electronics, humidifiers, indoor air quality systems, dehumidifiers, plumbing systems, electrical systems, surge protection systems, water heaters, thermostats, furnaces, and heating, ventilation and air conditioning or hvac equipment and systems, and residential heating, plumbing, air conditioning, and electrical systems; plumbing contractor services; maintenance of plumbing installations and components, septic systems and components, and water heater systems; plumbing services; electrical contracting services; electrician services, namely, conversion of residential property to use of natural gas; design, installation, implementation, repair and maintenance of solar power systems for residential and commercial buildings