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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.
heat exchangers being parts of machines
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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.
water heater controls, boiler control instruments, boiler valve controller; electronic gateways for communication interface with hvac automation systems; boiler management systems comprised of computer hardware, software, and controllers; isolation valve controller for boilers and electronic control units for water heater and boiler systems
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11
Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes.
water heaters for domestic, commercial and industrial use, tankless water heaters, heating boilers, pipes for heating boilers, direct vents for gas water heaters and boilers, heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, control panel, switches and electrical wire, all sold as a unit; water heating systems comprised of domestic water storage tanks, buffer tanks, steam traps, water pumps, and air filters
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37
Building construction; repair; installation services
maintenance and servicing of water heater and boiler systems; repair and refurbishment of hot water and boiler systems