FIELD: supply of hot process water to stock-rearing farms and other farms. SUBSTANCE: boiler is made in form of cylinders 3 and 5 mounted concentrically forming compartments which are connected in series. Center cylinder 5 has double wall and inter-wall space is filled with heat removing liquid; inner cylinders 3 are phase electrodes which are isolated from each other and from grounded section of housing 1. EFFECT: enhanced efficiency. 2 dwg
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