Our pan burners are constructed from high-quality tube burners covered in a bed of sand. The logs rest on a sturdy 5/8 wrought iron grate above the sand and ember bed. Gas percolates up through the sand and burns beneath the logs. Our Double Burners feature two unequal-length tube burners in a tapered sand pan. Designed to fit most conventional fireplaces, the double burner creates large swirling flames with a large ember bed. Includes Double Burner, 5/8 inch Grate, Embers, Lava Rock, Flex Line and Fittings. Features Model # BXR24MTN. Fuel Type Natural Gas. BURNER ONLY Millivolt Double Burner. UL Certified. Two unequal-length tube burners in a tapered sand pan. Designed to fit most conventional fireplaces. The double burner creates large swirling flames with a large ember bed. For use with LA24, LGLO24, LTH724,LTH1124, LKF,LFR24 and LPR24 by Empire Comfort System. Specifications Overall Dimensions 24 L . BTUs 75,000. Required Must Choose Log Set to Complete This Unit Not Included, Sold Separately 24-inch Advantage Refractory Log Set 7 Piece LA24 . 24-inch Fontier Refractory 9 Piece Log Set LFR24 . 24-inch Pioneer Refractory 11 Piece Log Set LPR24 . 24-inch Great Lakes Oak Refractory 6 Piece Log Set LGLO24 . 24-inch Tree House 7 Refractory 7 Piece Log Set LTH724 . 24-inch Tree House 11 Refractory 11 Piece Log Set LTH1124 . 24/30-inch Kensington Forest Ceramic Fiber 12 Piece Log Set LKF .