Slope Glaze Burners manufactured by Empire Comfort Systems. Special Ceramic Bead materials within the precisely ported burner swirl the flowing gas to produce naturally flickering flames. Glowing embers, included with the burner, add to the illusion of a real wood fire. Vent. All come with piezo ignition and standing pilot. The Variable Remote turns the burner off and on, and lets you vary the flame height to maintain a comfortable room temperature. All vent free burners include an Oxygen Depletion Sensor ODS to instantly shut off the system if oxygen in the room drops to unsafe levels. Empire Comfort Systems also manufactures Vented Burners without ODS for use only with an open damper flue. Includes Glowing embers and an Oxygen Depletion Sensor ODS . Features Model # VFSR16LP. Fuel Type Liquid Propane. Ignition Type Millivolt Control. Vent-Free Systems convert to Vented Systems by opening the Flue Damper. VFSV Systems Flame Height Controlled by Remote Supplied with unit. A Vent-Free Burner may be installed in a vented fireplace for use as a decorative appliance. A decorative appliance operates with an on/off switch or remote, and may not operate with a thermostat. BURNER ONLY Slope Glaze Burner. Specifications Overall Dimensions 16 L . Minimum Dimensions for Solid Fuel Burning Fireplaces 24 Front Width x 18 Back Width x 11.5 Depth x 18 Height . The dimensions shown are minimum clearances to maintain in installing this heater. Left and right clearances are determined when facing the front of the heater. Required Must Choose Log Set to Complete This Unit. Not Included, Sold Separately Ceramic Fiber 18-inch Multi-Sided Log set LSU18SF . Refractory Fiber 18-inch Multi-Sided Log set LSU18RR . Logs are shown in image, however not included in this product.