This Drolet High-Efficiency Wood Stove heats up to 2400 sq. ft. Built ruggedly with a 5/16in. steel top plate. The spacious 3.93 cu. ft. firebox is lined with firebricks and accepts logs up to 22in. long. Heavy-duty cast iron door has an adjustable handle. Single easy-to-operate air control above the door. <br>BTU rating is related to seasoned cord wood, the more common fuel burned in this stove.