Duluth Forge Vent Free Dual Fuel Gas Log Set - 30 in. Berkshire Split Oak - Remote Control Dual fuel technology operates off natural gas or liquid propane Thermostat remote control included to set the temperature LCD screen with remote control displays Safety pilot O.D.S. (Oxygen Depletion Sensor) for automatic shut off Minimum firebox size required: 20H x 34W in front (23W at rear) x 15D