HVAC air filter

aircraft charter services

respirators other than for artificial respiration

Ventilating ducts, not of metal

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 ceilings, namely, non-metal vents, non-metal vent caps, non-metal vent flaps, non-metal vent covers for HVAC ducts, and non-metal air grids

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