[Equest-users] SV-A: Discrepancy between system OA rate and sum of zone OA rates

[Bishop, Bill]

Hi Darryl,
From your SV-A report, if you sum the zone outside air flows, then add the zone exhaust flows, and divide by the supply cfm, you get the OA ratio of 0.223.
Hope that helps.
Also, I think I need bifocals.
Regards,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

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134 South Fitzhugh Street                 Rochester, NY 14608

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bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>             www.pathfinder-ea.com<http://www.pathfinder-ea.com/>

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From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Darryl Kasun via Equest-users
Sent: Friday, November 03, 2017 2:38 PM
To: equest <equest-users at lists.onebuilding.org>
Subject: [Equest-users] SV-A: Discrepancy between system OA rate and sum of zone OA rates

Good day everyone,

When I review the SV-A report for a PVAVS, there is a discrepancy between the OA rate at the system level and the sum of the zone OA rates and I'm not sure why. Hoping someone can help me out.

Here's the SV-A report:

[Inline image 1]

The OUTSIDE-AIR-FLOW was entered for each zone. No other OA inputs were entered at the zone level.

At the system level, below shows some of the OA inputs:

[Inline image 3]

And here's the MinOA Sch:

[Inline image 4]

Any help would be appreciated!

Thanks
Darryl

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