VENTILATION AND HEATING EQUIPMENT-NAMELY, AIR AND GAS OUTLETS, DIFFUSING UNITS, ENCLOSURES, SOUND TRAPS, SOUND ATTENUATORS, AND SOUND REDUCTION UNITS

AIR DIFFUSERS FOR VENTILATING APPARATUS; COMBINED AIR INLET AND AIR EXHAUST UNITS FOR VENTILATING APPARATUS; AIR OUTLET UNITS FOR VENTILATING APPARATUS HAVING LIGHT FIXTURES COMBINED THEREWITH; HIGH VELOCITY AIR DISTRIBUTING UNITS, VALVES CONTROLLING FLOW OF AIR TO SUCH UNITS AND LINKAGES FOR CONTROLLING SUCH VALVES; AIR FLOW VOLUME AND DIRECTIONAL CONTROL ELEMENTS AS DAMPERS, VANES, BAFFLES, AND DEFLECTORS; AIR DUCTS AND FITTINGS THEREFOR; MOUNTINGS FOR ELEMENTS AND ACCESSORIES OF AIR OUTLET...

NOZZLES; VALVES AND VALVE LINKAGES

Non-metal doors, namely, doors and doors with windows