Comfort Glow, 18", Vent Free Fire Log Set, 30,000 BTU's, Dual Fuel Natural Or LP Gas Connection, Thermostat Heat Control, 6 Piece Black Forest Painted Concrete Logs, Dual Yellow Flame, Dual Burner System, Oxygen Depletion System, No Electricity Required, Includes Lava Rock, Heats Up To 1,250 SQFT.