Dayton high-intensity heaters become highly efficient generators of infrared radiation by heating a ceramic refractory material to incandescence. The principal operation is to pass a gas-air mixture through a perforated ceramic refractory, and ignite it on the refractory surface. This causes the ceramic material to be heated to approximately 1780°F and generate large amounts of infrared radiation that may be directed anywhere heat is desired. Infrared radiation heats people and objects it strikes and not the intervening air. Included is a direct spark ignition system, manifold pressure tap, porous ceramic grids, a polished aluminum reflector and a chain set for hanging the heater. Typical applications are loading docks, warehouses, service garages, factories, aircraft hangars, etc. Item: Commercial Infrared Heater Gas Type: LP Heater Voltage: 120VAC BtuH Input: 90,000 Height: 22-1/2" Width: 26-5/8" Depth: 15-1/4" Hz: 60 Gas Inlet: 1/2" NPT Radiant Surface: 255 sq. in. Floor Dia. @ Mounting H: 20-28 @ 16-18 ft. Typical Sq. Ft. Coverage @ Mtg. Ht.: 575-785 @ 16-18 ft. Clearance to Combustibles Behind: 30" Clearance to Combustibles Top: 42" Clearance to Combustibles Below/Front: 98" Clearance to Combustibles Side: 48" Includes: Chain Hanging Set