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 models include a remote control built-in thermostat and adjustable flame height settings. Includes Embers Features Rating Variable 25,000/39,000 Btu/Hr. Model # BGE2436NV. BURNER ONLY Glow Ramp Variable Burner. Ignition Variable. Gas Type Natural Gas. Manifold Pressure 3.4 W.C. Inlet Gas Pressure in. of water Max 10.5 W.C., Min* 5 W.C. For use with Fiber Log Set LBG24-SM, LBG30-SM, LBG36-SM and Concrete Log Set LBG24-BM, LBG30-BM by Superior Fireplaces. Specifications Size 24 . Log Set is shown in image, however not included in this product.