The Mammoth Pine set is Real-Fyre’s largest set available. Originally designed with commercial locations (hotels and lodges) in mind, this set also makes a gorgeous addition to larger residential fireplaces. Also available for see-thru fireplaces. Experience the vented collection from Real Fyre and enjoy the splendor and warmth of a wood fire while dramatically reducing air pollutants. By burning Real Fyre Gas Logs instead of wood, you become a friend to the environment by preserving precious forest resources for generations to come. Enjoy the Radiant Heat and Elegant Beauty of A Realistic Log Fire Superior Refractory Ceramics Ensure Long Operational Life-Span Efficient Burning Helps Preserve and Protect Natural Resources This Peterson Real Fyre Log Set is Designed for Indoor Use Only Actual Number of Logs Depends on Size of Set BTU's (propane applications) 24" - 90,000 30" - 110,000 36" - 190,000 48" - 215,000 60" - 260,000 Minimum Fireplace Dimensions (FW- Front Width RW - Rear Width) 24" - 34FW X 30RW X 20D X 26H 30" - 40FW X 36RW X 20D X 30H 36' - 48FW X 44RW X 28D X 36H 48" - 60FW X 56RW X 28D X 36H 60' - 72FW X 68RW X 28D X 36H