cleaning and restoration of air handling systems; namely, airducts, return air space, air conditioning coils, filters, reheat coils, booster in-line sensors (air velocity, heat and cold), variable air controls, turning vanes and mixer boxes; indoor structures; namely, walls, ceilings, floors, doors, windows, light fixtures, elevators, elevator wells; and the contents; namely, drapes, furniture, carpets, appliances and equipment, of residential and commercial houses and buildings