Chofu Wood Fired-Hot tub heater -No electricity require Chofu Wood Fired-Hot tub heater -No electricity require Heat your hot tubwith wood! No noise, no electric bills! produces aprrox. 35,000 BTU stove body of the Chofu and the firebox are made with high quality 316 grade stainless steel 16" wide x 23" long x 18" high with at total weight of 60 lbs