Pleasant Hearth Convertible Vent-Free Dual Fuel Fireplace, 35-Inch, Cherry Rich Cherry Finish Dual fuel technology allows the unit to be operated with Propane or Natural Gas Up to 20,000 BTU's/hr heats up to 700 sq. ft. Thermostat control knob automatically maintains your ideal heat level Wall or corner installation options included Dual burner provides 2 rows of flames for a more full looking fire Separately sold blower works manually or automatically (GFB100) 2 Year Warranty