The reaction chamber outside wall is
made of 2 mm thick mild steel sheet and fabricated over an
L-angle frame of outside dimensions 36×36×44 cm. The inside
wall is a slotted mild steel cylinder with a refine clay placed
in-between the two walls. The fuel chamber is made of 2 mm
thick mild steel sheet and is located above the reaction
chamber. Biomass briquettes from the fuel chamber enter into
the reaction chamber by gravity. The primary air inlet is made
of 2 mm thick mild steel sheet and is attached on one side of
the reaction chamber. To reduce heat losses, the surfaces
above and below the secondary air holes are insulated with
refine clay and clad with a 1 mm thick Galvanized Iron (GI)