Gas Wall and Ceiling Unit Heater, Gas Type NG, Combustion Type Field Convertible, Fan Type Propeller, BtuH Input 100,000, BtuH Output 83,000, 1,600 cfm Air Flow, 6.4 A Full Load Amps, Gas Connection 1/2 in, Flue Dia. 5 in, O.C. Mounting 18 5/8 in, Height 33 3/4 in, Width 25 1/4 in, Depth 43 1/2 in, Indoor Air Discharge Height 24 1/2 in, Indoor Air Discharge Width 18 3/4 in, Heater Voltage 115 V AC, 60 Hz, Air Temp. Rise 47 Degrees F, Installation Height 8 to 12 ft, Ignition System Direct Spark