3 Plaque Infrared, 18,000 BTU, Natural Gas, Vent Free Wall Heater, Variable Heat Control, Piezo Ignition, Heats Approximately 750 SQFT, For Optional Blower Use #20-6127, Not Included. Check Your Local Codes For Installation Restrictions And Requirements.Product Dimensions: 24.21" H x 20.87" W x 10.24" D.