Hi, For one of the LEED CI project, the developer has provided louvers with motorized dampers in the AHU for fresh air intake. Can the louvers qualify for fresh air intake? if Yes, then how do we account this in the VRP calcualtion. Or is it necessary the fresh air inline fans to be provided in the AHUs.

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Scott Adams

Principal

Sustainable Integration LLC

LEEDuser Basic Member

12 thumbs up

Fri, 07/18/2014 - 01:29

Absolutely, that is how outdoor air is supplied by most package units. The multi-zone calculation only needs the total supply air and the amount of that air that is distributed to each zone. The minimum required outdoor air flow determined by the calculation informs what position the dampers have to be set at. AHUs will always provide the same amount of total air. The dampers only adjust what percentage of the air is OA.

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