Unverified83% confidenceFactTime unknown
排烟管每增加一个90度直角弯头，相当于增加约1.5-2米直管的阻力损失；实际排烟距离（直管+弯头折算）建议控制在3米内
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83%
Confidence
Long-term
Relevance
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Unverified排烟管总长度控制在3米以内、弯头不超过2个，每增加一个90度弯头相当于增加约1.5米直管阻力，超过则需选大风量油烟机（≥18m³/min）补偿91% similarUnverified分叉长度越长越自由但缠绕概率越高，一拖二每分支建议控制在40-60cm，超过70cm两犬易交叉绊倒行人69% similarUnverified轮径越大越省力越易过障碍：室外或有门槛环境选轮径≥125mm，纯平地室内可选75-100mm；轮径过小遇到3cm以上门槛会卡住69% similarUnverified国标公共烟道预留孔径多为160mm或180mm，家用油烟机出风口常见150mm，需配150转160/180变径圈或止逆阀法兰盘实现密封过渡68% similarUnverified顶吸机型的吊柜安装高度应保证机体底部距灶面65-75cm，过高（＞80cm）显著降低吸烟效果；侧吸则一般距灶面35-45cm安装68% similar
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