7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
motors for use in residential air conditioning units, heat pumps, furnaces, air handlers, and coils; blower wheels for use in furnaces and air handlers; pressure switches as parts of machines; fan blades; compressors; air condensers for air conditioners for household and commercial use; mechanical heat pump condensers for use in hvac systems
9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
flame sensor for use in furnaces; electrical components in the nature of relays; gas valves for use in furnaces; electrical circuit boards; limit switch for use in furnaces; wire harnesses; electric transformers; water sensors; crankcase heaters; electric circuit switches; time-delay relays; electrical components in the nature of protection relays, electric contactors, capacitors, control boards in the nature of electric control panels for use in heating, ventilation, and air conditioning systems, air conditioners, and heat pumps, and fuses for use in heating, ventilation, and air conditioning systems, air conditioners, and heat pumps
11
Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes.
kits for converting furnaces from running on natural gas to running on propane; electric heating strips; induced draft blowers; reversing valves; ignitors for use in furnaces; burners for use in furnaces; expansion valves; heating, ventilation, and air conditioning systems; ductless heat pumps; mini-split heat pumps; furnaces, air handlers, and coils, as part of forced air heating ventilation and air conditioning systems