FIELD: heating system.
SUBSTANCE: unit contains supply and exhaust fans, a polymer heat exchanger, a recirculation channel with an air damper placed in it, mounted on the hollow shaft. The whole circuit of the damper is equipped with a heating electric cable, which rounding the damper, enters the cavity of the shaft and goes beyond the recirculation channel.
EFFECT: increase of reliability of the heat recovery unit, including during operation in conditions of negative temperatures.
2 dwg
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