The Heartland Oak Vented Log Set by Duluth Forge recreates the look and feel of a real wood-burning hearth. This Vented Gas Log Set was molded from real wood providing a realistic appearance that incorporates charring, deep bark texture and split accents. The U- Burner chassis design provides multiple rows of flames which brings you the most realistic flame patterns. Like a real wood burning fireplace, the Heartland Oak requires a fully functional chimney with an open flue when in use. The glowing embers create the most illuminating beauty of a warm and classical ambiance. Product Features • 45,000 BTU • Natural Gas operation • Liquid Propane conversion kit available; Model NVDWA1 • 8 hand painted realistic detailed logs using superior refractory ceramics to ensure a long life-span • U-Burner chassis design allows for large, full flames throughout the log set • Match Light Manual Ignition • Must be installed in a masonry fireplace or vented firebox • Flue must be open at all times when in use • 1 bag of Glowing Embers Included • 1 bag of Vermiculite Included • Damper clamp included • Minimum Firebox Size Required: 18"? H x 24"? W in front (18"? W at rear) x 15"? D • PFS Approved • Designed for Indoor Use Only Lava Rock (LAVR1) and Ember Log Kit (FELK) Shown In Picture Not Included.What''s In the Box? - U-Burner Chassis - Qty. 1- Hand Painted Ceramic Logs - Qty. 8- Iron Grate - Qty. 1- Bag of Embers - Qty. 1- Bag of Vermiculite - Qty. 1- Damper Clamp - Qty. 1- Hardware Pack - Qty. 1