HART & COOLEY

REGISTERS, GRILLES AND DIFFUSERS FOR AIR DISTRIBUTION SYSTEMS; MANUAL AIR VOLUME DAMPERS; CONTROL GRIDS AND BAFFLES FOR USE WITH REGISTERS, GRILLES AND DIFFUSERS FOR AIR DISTRIBUTION SYSTEMS; AIR CONDITIONING AND FURNACE ACCESSORIES, NAMELY, BASEBOARD AND FLOOR REGISTERS, SIDE WALL REGISTERS, VENTILATING REGISTERS, CEILING DIFFUSERS, AND 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; MANUAL DAMPER REGULATORS AND REGULATOR SETS COMPRISING CHAIN, PULLEYS, HOOKS AND SCREWS PACKAGED TOGETHER; GAS VENT PIPES AND CHIMNEYS; FLEXIBLE DUCT PRIMARILY OF NONMETAL FOR USE WITH AIR DISTRIBUTION SYSTEMS; AND METAL AIR DUCT FITTINGS FOR USE WITH AIR DISTRIBUTIONS SYSTEMS