FIELD: construction. SUBSTANCE: during lighting the stove, the flow of flue gases having a lot of products of uncompleted combustion of fuel are discharged to the atmosphere directly from the fire chamber. Increased temperature in the furnace chamber results in decreasing amount of products of uncompleted combustion in the flow of flue gases. As soon as the temperature of completed combustion is achieved in the fire chamber, discharging of the flue gases is cut off and the gases are directed through a layer of stones. EFFECT: enhanced efficiency. 3 cl, 7 dwg
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