Product Type Portable Gas Radiant Cabinet Heaters Fuel Type Propane Heating Capacity Output 18 000 BtuH Heating Area 600 sq ft Minimum Cylinder Size 20 lb Ignition Type Matchless Piezo Ignition Power Source Manual Overall Height 23 3/8 in Overall Width 14 3/4 in Overall Depth 15 1/2 in Safety Features Front Safety Grill Oxygen Depletion Sensor Air Temperature Rise 122 Degrees F Features Locking Casters Oxygen Depletion Sensor (ODS) Side Carry Handles