Compact modular heater features high-intensity ceramic burner, highly polished aluminum reflector, and water-resistant circuitry. Item: Commercial Infrared Heater Gas Type: NG Heater Voltage: 24VAC BtuH Input: 60,000 Height: 22-1/2" Width: 19-1/8" Depth: 15-1/4" Hz: 60 Gas Inlet: 1/2" NPT Radiant Surface: 170 sq. in. Floor Dia. @ Mounting H: 16-20 @ 14-16 ft. Typical Sq. Ft. Coverage @ Mtg. Ht.: 325-400 @ 14-16 ft. Clearance to Combustibles Behind: 18" Clearance to Combustibles Top: 40" Clearance to Combustibles Below/Front: 72" Clearance to Combustibles Side: 32" Includes: Chain Hanging Set