FIELD: hot water supply systems. SUBSTANCE: plant has boiler with water-cooled furnace provided with burner device and connected to convective gas tube bundle and sectional water heater for hot water supply connected to boiler by its heating line; each section of water heater is made in form of vertical two-pass heat exchanger; sections are connected in parallel to water space of boiler by inter-tube space and in series by tube space of water being heated. EFFECT: enhanced reliability. 1 dwg
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