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CS-2009 EAc1:Optimize Energy Performance

Pressure drop adjustment factor with DOAS System

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Curtis Clark
Director of Sustainability Services
GSBS Architects
LEEDuser Basic Member
3 thumbs up

In the proposed model, we have a HEPA 13 filter in a dedicated outdoor air unit which serves a variable refrigerant flow system. In the baseline model, we have VAV system with an economizer. In determining the baseline fan power, should we apply the 0.9 inches of water column pressure adjustment to the minimum outdoor air flow rate, or to the maximum outdoor air flow rate which occur during the economizer mode?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 04/09/2015 - 14:51

It depends on the location of the filter. If it treats all of the outside air as it enters the system then yes it gets applied to the maximum outdoor air flow.

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