Average values obtained result very consistent and reliable with relative coefficient of variation ranging between 0.0 and 0.2. Total duration of the test, which represents the duration of the fuel batch, varies according to operations done during the run. In particular in the third a special attention was given to the regulation of the draft using a butterfly valve. That resulted in a longer duration (70 min) and lower mean firepower, but without influence on other parameters. Average thermal efficiency resulted 18% that is a value lower than the one of improved wood stoves (25% according
to Sanchez, 2010), but acceptable considering the evolution stage of the prototype and the difficulties in using rice husk as a fuel.
Generally values obtained can be compared to the ones reported
in literature for the Mayon Turbo stove (Aprovecho Research Center,2005), one of the few rice-husk fuelled cook stove available.