HC &

AIR CONDITIONING AND FURNACE ACCESSORIES-NAMELY, BASEBOARD AND FLOOR REGISTERS; SIDE WALL REGISTERS; VENTILATING REGISTERS; CEILING DIFFUSERS; PERIMETER DIFFUSERS; COMMERCIAL REGISTERS AND GRILLES USED IN HEATING AND AIR CONDITIONING SYSTEMS; DAMPERS; DAMPER KITS COMPRISING DAMPER BEARINGS, COUNTERWEIGHTS, CHAIN, CHAIN COUPLING AND CHAIN LOCK; DAMPER REGULATORS AND REGULATOR SETS COMPRISING CHAIN, PULLEYS, HOOKS AND SCREWS PACKAGED TOGETHER