In this new wood burning stove design, primary air enters through the combustion chamber wall which is made of perforated screen surrounded by a bottom-opening cylindrical cover and where stacked wood sticks are placed. A rectangular fuel feed opening is located above, and a sliding cover plate provides an adjustable fuel feed opening. The wood sticks are placed on a fuel rest plate, and remain at an incline of 30 degrees with respect to rest plate center to burn more efficiently. Primary air circulates around the wood for better mixing during combustion. A secondary air stream is preheated in double-walled annular secondary air passages, which surround the combustion chamber wall and mix with effluent gas through the perforated screen wall above the fuel feed opening to achieve better combustion. Primary air and inner secondary air are available from the air space in between lower perforated wall of the combustion chamber and surrounded large diameter cover. Inner secondary air supply passage is blocked by the fuel feed opening. Outer secondary air supply passage is not provided at the location of fuel feed opening side and the rest area of the passage gets air from air entry holes cut at the lower end of outer secondary air passage circumferential wall and this secondary air stream is reached to combustion chamber first through the openings cut at upper portion of the inner secondary air supply chamber and then through upper perforated wall of combustion chamber. Double walled secondary air passages are implemented to reduce heat loss from combustion chamber to the surroundings. In the new stove, as primary air is entered through perforated wall located above the fuel rest plate, not through conventional grate at bottom so, deposited ash on fuel rest plate cannot be able to block the air passage for primary air entry. In the new stove, ash removal is possible after a long interval, practically after completion of cooking. The deposited hot charcoal particles and ash also help to preheat the primary air. Ash removal process is very simple. One end of the fuel rest plate is hinged with the lower part of combustion chamber wall and the other end is arranged with a hinged lock clip fitted with outer wall of the stove. Ash is cleared by opening the lock clip and dropping one end of the rest plate, eliminating the need for an ash chamber below the grate. The design also avoids the complicated shaker grate system of many metallic wood stoves.
(Flat bottom/Round bottom)