Heating equipment installation and repair; installation, repair and maintenance of heating equipment; maintenance and repair of heating installations; general contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; installation and repair of heating, ventilating and air conditioning equipment; installation and replacement service for heating, ventilating and air conditioning systems; repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems