Unverified80% confidenceDecision RuleTime unknown
带止逆阀（防倒灌）的换气扇能防止公共烟道异味和邻居废气倒灌，高层住宅和公共排风管道楼栋必选，否则关机时会串味
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80%
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Long-term
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Unverified带止逆阀(防倒灌)的排气扇能防止公共烟道异味或冷风倒灌回室内，高层住宅和共用烟道楼栋应优先选择带止逆功能的机型95% similarUnverified高层住宅或使用共用烟道的户型必须选带防回流阀(止逆阀)的换气扇，否则邻居异味、油烟会倒灌，且冬季冷风回流严重84% similarUnverified无防逆风设计的换气扇不建议用于共用排烟道或高层楼房的宠物间，会导致邻居油烟、异味倒灌，反而加重室内空气问题81% similarUnverified多户共用公共烟道时不宜选换气量过大机型，超出烟道设计排量会导致互相倒灌串味，此类楼栋应选带止逆阀的中等风量机型（150 m³/h左右）而非盲目追求大风量81% similarUnverified没有独立排风管道、共用公共烟道的房子不建议装大风量排气扇，会导致邻居异味倒灌，必须选配单向止逆阀80% similar
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