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Baseline VAV OA vs Proposed DOAS OA

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Hi all,

I'm looking for guidance on which number to use for my baseline OA when compared to the proposed system.

The proposed HVAC system is DOAS - FCUs. OA requirements according to ASHRAE 62.1 are 10,216 cfm. However, to satisfy exhaust requirements, the total system ventilation, i.e. OA as it's a DOAS, is 13,160 cfm.

Does the baseline OA need to equal 10,216 or 13,160 cfm?

Thanks

D?nal

May 10, 2013
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Dónal OConnor
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