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AirChanges/Hour in EnergyPlus

infiltration
ach
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Hi all,

I was wonderring if anyone knows what is the reference pressure for Air Change per Hour (ACH) under ZoneInfiltration:DesignFlowRate object.

More specifically, for AirChanges/Hour field, is the pressure difference based of 4 Pascals ACH or 50, ?

Thanks, Mohammad

asked 2023-10-11 12:03:24 -0500, updated 2023-10-11 20:51:37 -0500

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The ACH should reflect expected pressure differences across the building envelope during normal occupation/operation (just like the 4x other "Design Flow Rate Calculation Methods"). So yes, closer to 4Pa (than 50Pa or 75Pa).

Denis Bourgeois

answered 2023-10-11 15:09:29 -0500, updated 2023-10-11 15:10:18 -0500

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Thanks for your clarification.

Mohammad (2023-10-11 20:52:19 -0500) edit

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