FIELD: metallurgy.
SUBSTANCE: presented device includes a burner with slots connected with under body gas flue by gas flue vertical portion, and a cylindrical heat exchanger mounted on the gas flue vertical portion, with gas flue length coverage equals to 0.7÷0.9 of overall length of the gas flue portion, with a gap between the heat exchanger and the gas flue of 30÷100 mm, wherein in the lower end portion of the heat exchanger there are openings for supplying air to the heat exchanger, and an opening in the upper end portion for supplying air to air inlet of the burner slots.
EFFECT: improved convection of heated air providing targeted delivery thereof to air intake slots of the burner.
3 dwg
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