FIELD: heating.
SUBSTANCE: water-heating boiler comprises a combustion chamber, convection pass and bypass flue with the control elements, at that the boiler is provided with additional external bypass flue with control regulating elements connecting the combustion chamber of the boiler to the main flue behind the boiler output window.
EFFECT: increased stability of draft on the boiler regardless of the heat load and the boiler operation as a whole on natural draft.
3 cl, 1 dwg
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