Sure Heat Mountain Vernon Oak Vent free Dual Burner Log Set for Natural Gas Fueled Fireplace, 24-Inch (Includes 6 logs) Six highly detailed, hand painted ceramic logs traditionally stacked on a tiered grate realistically recreate the look of a mature fire in your fireplace CSA approved heating appliance will heat 1200-1500 square feet with 99.9-percent efficiency Fits all fireplaces with minimum dimensions of 36-inch front width; 15-inch depth; and 25-inch back width Manually controlled valve system and push button ignition. BTUs - 34,000/40,000 100-percent carbon monoxide and oxygen depletion safe.