It USES steam or electric heater as heating resource and USES axial fan, heat exchanger to heat air in convective way.
它是利用蒸汽或电为热源，用轴流风机与热交换器以对流的方式加热空气。
According to the efficiency of heat exchanger, we can determine the suitable conditions of outdoor air for heat recovery from exhaust air by considering energy consumption of fan.
根据换热器的换热效率，考虑风机能耗，可以确定适合进行排风热回收的室外空气参数。
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