After the comparison between the stove and down-draft gasifier biomass stove by charcoal mass 0.6 kg water 3 kg the same amount, the results experiment 3 times of stove and down-draft gasifier biomass stove showed that the efficiency from the stove was 16.53% water evaporation 1.26 kg while the efficiency from the down-draft gasifier biomass stove was 20.07% water evaporation 1.63 kg. Which concluded that the efficiency of the down-draft gasifier biomass stove was higher than the stove by starting from water 3 kg get was heated to vaporize higher than the stove.