Gas Wall Furnace Heater Type Fan Forced Counterflow Gas Type LP BtuH Input 55 000 BtuH Output 42 000 Ignition Type Matchless Piezo Air Flow 400 cfm Vent Type Top Voltage 115 Vent Oval 4 In. Wall Type Single Gas Connection 3/8 in NPT Width 16 In. Depth 11-5/16 In. Height 82-3/8 In. Wall Opening Width 16 In. Wall Opening Depth 0 to 11 In. Wall Opening Height 82-1/2 In. Amps AC Less Than 1 Number of Speeds 1 Built-In Features Removable Panels for Easy Cleaning