The King 1107 is available in Ultra, Parlor and Classic models. With a 4.27 cu. ft. fire box, this stove isnt just large but deep, providing safety, the ability to load up to 80 pounds of wood and reduce ash removal intervals. With an 8″ flue and an honest to goodness thermostat, the King can burn up to 40 hours on a low setting. Produces up to 47,000 Btus and efficiencies as high as 82.5%! Blaze Kings optional dual variable speed fans are available on all King and Princess models.