In the first frame of the fuel through the combustion temperature.Through the heat exchanger to heat the air through the heat exchangerafter the air temperature drops below 250 degrees Celsius, and thendischarged. Heating of the air blowing fan for distribution to thestove, the air absorbs the heat to the nominal value, will be hot airfrom the exhaust vent. When the air temperature limit is reached whenthe burner can be stopped or turned into a small fire. When the airtemperature down to the rated limit, when the burner is automaticallyturned to the fire.