Product Type Free-Standing Vented Gas Floor Heater Fuel Type Propane Cabinet Style Solid Face Heating Capacity Input 20 000 BtuH Heating Capacity Output 15 500 BtuH Thermostat Included No Vent Diameter 3 in Overall Height 21 1/2 in Overall Width 23 in Overall Depth 11 in Safety Features Vent Limit Switch Connection Size 1/2 in Connection Type NPT Floor to Center of Vent 17 in Heating Area 500 sq ft Heating Method Gravity Convection Housing Color Black