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NC-2009 IEQp1:Minimum IAQ Performance

Split System Heat Pumps with Heat Recovery Ventilators

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Nancy Henderson
Managing Member
ArchEcology, LLC
LEEDuser Basic Member
67 thumbs up

We are working on a residential building that has common areas which are conditioned with split system heat pumps and heat recovery ventilators for fresh air. Normally I would consider this a single zone system, but the HRU's serve multiple zones and systems (there are 4 HRU's and 10 split system heat pumps). Fresh air is ducted to each zone from the HRU, but there is only one return grill. Would I still treat this as a single zone system - or do I have to go to the multi-zone?

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Roger Chang
Principal, Energy and Engineering Leader
DLR Group | Westlake Reed Leskosky
LEEDuser Expert
267 thumbs up

Mon, 06/30/2014 - 15:24

Nancy, you should treat this as a 100% outdoor air system, as long as a split system heat pump does not serve more than one zone.

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