other alternatives is estimated to range from 15 years for natural gas to nearly 300 years for coal (Yawas 2003). The demand for fuel wood will, therefore, continue to increase in response to the cost and availability factors stated above. This will in turn also continue to elicit innovations and improvements in the design of wood-burning stoves.
The development of wood-burning stove is not a recent development, several improvement works have been done on the stove design. Apart from the economic and environmental considerations, the other main issue which motivates the various developmental efforts of the wood stove is the health factor (Joseph et al. 1990, Karekezi 1992). The Kilakala stove, a mud stove built using locally available materials and developed at the Sokoine University, Tanzania, has a fuel saving capacity of 30% (Crewe 1990, Otiti 1991). One of the major disadvantages of the