Office Fresh air ventilation system

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{"cid":"113603","pid":"21712479","pimg_url":"\/\/img1.tradegrowthhub.com\/46\/13\/4c467631fbff\/product\/72686399_s-w400xh400.jpg","name":"Energy saving fan energy recovery HVAC parts, indoor fresh air ventilation system, heat recovery ventilation system","attrs":{"Price":"$4,000.00(1 - 99 Sets) $100.00(>=100 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"TENRUN, TENRUN"}}