Large woodstove with a Internal Water Jacket; The combustion chamber is surrounded or integrated with a water jacket that extends heat transfer directly into the fluid. comes with a Teel circulator and hydrostat. Internal box dimensions are 28 x 16 x 20. door opening is 13" wide x 12" high. 8" flue. Heated and provided domestic hot water for a 2K sq ft house. $1000 OBO. Can load on your vehicle/trailer.