A vented/Vent-Free gas log set makes a great alternative to the hassle of building a log fire in your wood-burning fireplace. Just like a wood fire, a vented gas log set provides plenty of mesmerizing flames and flickering light. Vented/Vent-Free log sets are considered decorative systems and must be installed in a vented fireplace. Includes Four Piece Log Set. Features Model # LS18B2. Gas Type Natural Gas/Liquid Propane. Four piece log set. Log sets are hand painted. Approved for use in any certified vent-free firebox. For use with slope glaze burner system. LOGs ONLY Birch Log Set. Specifications Overall Dimensions 18 L . Required Must Choose Burner to Complete Log Set. Compatible Burners Vent-Free IP 18 inch Slope Glaze Burner with Thermostat Variable Remote Control VFSE18N VFSE18P . Vent-Free Manual 18 inch Slope Glaze Burner with Standing Pilot/Piezo VFSM18LP VFSM18NAT . Vent-Free 18 inch Slope Glaze Burner with Remote Ready and Standing Pilot/Piezo VFSR18LP VFSR18NAT . Vent-Free 18 inch Slope Glaze Burner with Remote and Variable Flame VFSV18LP VFSV18NAT . Vent-Free MV 18 inch Slope Glaze Multi-Sided Burner with Remote Ready Standing Pilot/Piezo VFSUR18N VFSUR18P . Vent-Free IP 18 inch Slope Glaze Multi-Sided Burner with Thermostat Variable Remote Control VFSUE18N VFSUE18P . Vented Manual 18 inch Slope Glaze Burner VSM18LP VSM18NAT . Vented MV 18 inch Slope Glaze Burner with Remote Ready VSR18LP VSR18NAT . Burner is shown in image, however not included in this product.