Customize your new fireplace or update your old one with the Moda Flame Ventless Bio Ethanol Fireplace Grate Burner Insert. Both a 24-inch (Dimensions: 25W x 10.8D x 5.1H inches) and a 36-inch (Dimensions: 37W x 10.8D x 5.1H inches) model unit are yours to choose from (subject to availability). Each burner and grate are constructed from solid stainless steel and use bio-ethanol for fuel, meaning the units are efficient and won't cloud your room with smoke, ash, or odors. Each burner is portable and can be moved from room-to-room (if positioned safely) or installed permanently in a firebox. The 24-inch model boasts a maximum 16,000 BTU output with 7-9 hours of run-time on a full tank; the 36-inch model can produce up to 22,000 BTUs and runs for 6-8 hours. Both options come with a steel damper tool to help safely snuff the flames.