Get warm and cozy any time and without hassle with the Duluth Forge Ventless Dual Fuel Gas Log Set. Built for ease of use with solid construction, this fireplace log insert will keep you and your family comfortable year after year. Featuring 30,000 BTUs and coverage of 1,100 square feet, these gas fireplace logs are sure to create just the warmth you need in any room of your home. The vent-free gas logs heat the air and circulate the warmth through the room, much like your central heating system. Enjoy the fire log's economical design offering 99.9 percent efficiency with an added safety Oxygen Depletion Sensor (O.D.S.) auto-shutoff function if carbon monoxide or lack of oxygen is detected. Rely on the user-friendly Piezo ignition for seamless startup and control the 5-setting thermostat to set the perfect climate. Crafted with amazing detail, the faux fireplace logs are hand-painted and cast in concrete from real wood for a high-end look. Not to mention, the use of refractory ceramics ensures long-lasting use. The U-Burner chassis design showcases 2 rows of flames, creating a realistic-looking fire that is sure to inspire awe. This propane or natural gas fireplace accessory is suitable for indoor use only and must be installed in a masonry or agency-approved firebox. No outside chimney or duct is needed for added user convenience. Bask in the glow and warmth of a fireplace without the mess using this Ventless Dual Fuel Gas Log Set from Duluth Forge.