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CI-2009 IEQp1:Minimum IAQ Performance

VRV unit with Constant Air Volume system

Hi We are working on a project where the HVAC system is VRV unit. Air distribution system has a treated fresh air unit. When the fresh air unit is turned on, whether the meeting rooms are occupied or not, whether the indoor unit is turned or not, the fresh air will be supplied to meeting rooms. The same scenario is repeated in office space. Can I consider air distribution system as a constant air volume system and report Ds as 100%. Appreciate your inputs and suggestions. Thanks Sriman

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

Fri, 11/30/2012 - 16:49

Sriman, this should be considered a 100% outside air application due to use of a make-up air (fresh air) unit. Ds should be 100%.

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