6
Metal ventilation channels, namely, ventilating ducts of metal, metal air conditioning ducts, ventilating ducting systems of metal, comprising ventilating ducts of metal, metal air vents, metal air vent covers, and metal vent flaps; metal ventilation grilles, namely, metal roof vents for ventilation, metal air vent for fitting in walls, roofs and ceilings, metal vent flaps for fitting in walls, roofs and ceilings, metal vent cover for HVAC ducts, and metal air grids for fitting in walls, roofs and ceilings
11
Ventilating fans for commercial, industrial, residential and household use; fans for exhaust extractors; flues for ventilating apparatus
17
Non-metal flexible pipes, tubes, hoses, and non-metal fittings therefor
19
Ventilation channels, not of metal, namely, non-metal ventilating ducts, non-metal ventilating ducting systems comprising non-metal ventilating ducts, non-metal vent covers, and non-metal vent flaps; ventilation grilles, not of metal, for fitting in walls, roofs and ceiling, namely, non-metal vent caps, non-metal vent flaps, non-metal vent cover for HVAC ducts, and non-metal air grids
20
Ventilation grilles, not of metal, for fitting in doors, windows and furniture
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