FIELD: central heating systems. SUBSTANCE: radiator has a section made as a tubular member of rectangular cross-sectional area with relation of sides from 1:2 to 1:5. Hollows are plugged with stoppers made in the form of cups embedded in them. Radial threaded holes are provide in walls of cups for coupling with sections of tubes. EFFECT: enhanced convective heat exchange and reduced specific quantity of metal. 3 dwg
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