设置排风热回收装置能节多少能？
How much energy can be saved by heat recovery equipments from extract air？
摘要：
分析了相关标准中对设置排风热回收装置的规定，举例分析论述了设置排风热回收装置的必要条件和充分条件。
关键词：排风热回收装置 效率 节能 新风量 排风量
Abstract：
Analyses the provisions of installing heat recovery equipments of extract air promulgated in related standards. Based on some example presents the necessary condition and sufficiency condition for setting heat recovery equipments of extract air.
Keywords:heat recovery equipment of extract air, efficiency, energy saving, fresh air volume, exhaust air volume