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Q:What is the optimal wind speed at HEPA air outlet?

Q:What is the optimal wind speed at HEPA air outlet?

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A:Unidirectional air flow: particles are removed at appropriate wind speed (Mean section wind speed v=0.25~0.35m/s), thus 0.40~0.6m/s wind speed is preferred at air outlet.
Non-unidirectional air flow: particles are captured by air flow, thus, wind speed at HEPA air outlet is 1~2m/s; if HEPA is mounted in AHU, only traditional air outlet is used, wind speed at air outlet should preferably by 2~3m/s; when wind speed is ≥0.3m/s, due to low temperature of outgoing air, human body many feeL uncomfortably, hence the operator should not locate in exact downstream section of air outlet.