The present invention provides a biomass gasifier stove having an air preheater device that facilitates the combustion. The biomass gasifier stove comprises a drum. a pipe, a conical hollow member and an inlet pipe. The biomass gasifier stove of the present invention reduces carbon monoxide emissions by 30%. The air preheater device of the present invention improves the fuel efficiency of the design, consuming 10 % less fuel than the stove without the air preheater device.
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