With the Duluth Forge Berkshire Stack Oak, you can enjoy a set of quality Ventless Gas Logs. Get a realistic looking fireplace without the mess of chopping or hauling wood and add that warm elegant touch to your home. The intricate detailing on each of the highly detailed ceramic logs will bring your hearth to life. Our design team started with real logs to create a log set that gives the feel of a mature fire focusing on the bark and charring elements to provide an outstandingly detailed look to create a log set that looks as good without flames in the warmer months as it does when burning. Enjoy Thermostatic Control, 33,000 BTU of heat and the overall savings to your heating bill provided by Vent Free Heating. Product Features: 33,000 BTU Heats up to 1,300 sq. ft. 1 Unit operates off Liquid Propane Thermostat Control - The control automatically cycles the burner on and off to maintain a desired room temperature 8 hand painted realistic detailed logs using superior refractory ceramics to ensure a long life-span Solid, well-built black powder coated chassis Ember Burner chassis design provides one row of flames and a glowing ember bed to create a realistic fire High End Ember Burner chassis has a large glowing ember bed appearance and gives a more lifelike look Economical: 99.9% efficient. No outside duct or chimney needed! Safety Assurance: SAFETY PILOT O.D.S. (Oxygen Depletion Sensor) included with automatic shut-off Battery Assisted Piezo ignition (Requires 1 AAA Battery - Included) Must be installed in a masonry or agency approved firebox Minimum Firebox Size Required: 20" H x 28" W in front (23" W at rear) x 15" D Safety Assured ANSI Certified System PFS Approved Designed for Indoor Use Only 1 bag of glowing ember material included What's In the Box: U-Burner Chassis - Qty. 1 Hand Painted Ceramic Fiber Logs - Qty. 8 Bag of Embers - Qty. 1 Hardware Pack - Qty. 1