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NC-2009 IEQp1:Minimum IAQ Performance

Vdzd - primary air flow

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SW LEE
Project Manager
LEEDuser Basic Member
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in this project, each regularly occupied space have ventilation grill and OA grill - separately. in the LEED form, should i determine the Vdzd are both the ventilation CFM and OA CFM?

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Mon, 03/17/2014 - 12:42

Your question is quite confusing. What is the make-up of the air coming out of each grille?
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SW LEE
Project Manager
LEEDuser Basic Member
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Tue, 03/18/2014 - 02:16

Hi Andrew, sorry to confuse you. for example, in a meeting room, we have dedicated FCU unit and dedicated OA grille . Even when FCU were off, the OA still fill up the room. Is the value for Vdzd are the combination of FCU and OA CFM?

Tue, 03/18/2014 - 02:35

No, you should use the OA flow as the Vdzd. It seems from your description that if you require anything less than 100% OA using that method then you are fine. Make sure that your Ez is 1.0 if you are not supplying hot air through the dedicated vent.

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