FIELD: heat-power engineering; heating and hot- water supply systems for buildings and structures. SUBSTANCE: plant includes cooled gas-type heat generator and gas duct where two heat exchangers and hot well with drain chutes are located. Scheme of hydraulic loop where second heat exchanger works in countercurrent mode at temperature close to temperature of liquid circulating at plant inlet, as well as structural features of hot wells and flame holders ensure high thermal efficiency of plant. EFFECT: enhanced efficiency; ecological safety; enhanced operational reliability. 6 cl, 5 dwg
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