FIELD: heating.
SUBSTANCE: boiler relates to water heaters, in which heating is carried out by heat carrier of heating system when internal tank is washed along its external walls, thereby heating water in internal tank. Boiler comprises an external tank in the form of a cylindrical shell with heating liquid inlet and outlet nozzles, external heat insulation, inner tank having walls with wavy profile, heated water inlet and outlet branch pipes installed in neck with flanged edge, which is welded in upper bottom of inner tank, external tank is welded to neck with circular seam.
EFFECT: increased area of heat exchange.
1 cl, 1 dwg
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