2 Plaque Infrared, 12,000 BTU, LP Gas, Vent Free Wall Heater, Variable Heat Control, Piezo Ignition, Heats Approximate 350 SQFT, For Optional Floor Stand Use #20-5345, Not Included. NOTE: The state of California prohibits the use of this product. Please check your state and local codes prior to purchase. Due to the built-in oxygen safety sensor vent free products may not work properly at elevations of 4500 ft.