Unverified92% confidenceDecision RuleTime unknown
无窗卫生间或暗卫必须选带止回阀（防逆流）的型号，否则楼上住户异味、返味会通过公共烟道倒灌，止回阀能在停机时自动封闭风道
1
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92%
Confidence
Long-term
Relevance
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Unverified无窗内卫必须选带止逆阀（防倒灌）的管道排风扇，否则邻居家串味和公共烟道回气会倒灌入室88% similarUnverified不要把报警器安装在燃气灶正上方、抽油烟机排风口、窗户通风口或墙角死角，正上方受高温油烟干扰误报，通风口气体被吹散会漏检。75% similarUnverified接入公共烟道必须加装止逆阀（防回流阀），优先选双层弹簧片或重力翻板式，能有效阻挡邻居串味和倒灌；顶楼或独立外墙排放可不装以减少阻力73% similarUnverified内置防倒灌二极管省去外接控制器，即插即用接点烟器，但前提是车辆点烟器在熄火状态下仍通电，否则无法工作72% similarUnverified带止逆阀（防倒烟风门）的机型能防止公共烟道邻居油烟串入，高层住宅几乎必备；部分机型止逆阀为塑料件易老化，选金属阀门更耐用71% similar
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