The Superior unique, clean burning design provides 99% heating efficiency, allowing you to operate the logs vent-free with the fireplace damper closed. With no venting required, there is no heat loss up the chimney. Plus heating with Superior gas logs means you'll never again be left in the cold with wet logs or without heat during a power outage. Variable remote and electronic ignition models include a remote control built-in thermostat and adjustable flame height settings. Includes Triple Flame Burner Only Features Model # TF18NE. BURNER ONLY Triple Flame Electronic Burner. Rating Variable 24,000/28,000 Btu/Hr. Gas Type Natural Gas. Ignition Electronic. Manifold Pressure 4.5 W.C. Inlet Gas Pressure in. of water Max 10.5 W.C., Min 5 W.C. For use with Fiber Log Set LTF18MM and Concrete Log Set LTF18RS, LTF18WT by Superior Fireplaces. Specifications Size 18 . Log Set is shown in image, however not included in this product.