FIELD: ventilating or air-conditioning systems.
SUBSTANCE: system comprises air ducts for air to be cooled and heated, air filters, counterflow air-air heat exchanger, and forcing and exhaust fans. The air-air heat exchanger is connected with the air ducts through reverse valving boxes. The exhaust fan is mounted upstream of the heat exchanger, which generate excess pressure in the heat exchanging passage of the heat exchanger. The forcing fan is mounted downstream of the heat exchanger, which generate rarefaction in the heat-receiving passage of the heat exchanger.
EFFECT: enhanced efficiency.
1 cl, 1 dwg
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