[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

换气扇风口/管道口径需与预留排风管匹配(家用常见Φ100/Φ150),口径不匹配需变径接头会额外增加风量衰减和噪音;大风量机型应配Φ150管道以充分释放性能

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