Duluth Forge FDI32R Fuel Vent Free Insert, Remote Control, 32000 BTU Fireplace, Black 32,000 maximum but using natural gas or liquid propane (patented dual fuel technology) Safety assurance: O.D.S. (Oxygen depletion sensor) included with automatic shut-off Remote control included, functions: On/off, temperature control 9 realistic hand painted ceramic fiber logs Dual precision ported vent free gas burner