Hi everybody,
from the precedent thread I understood that when I have a 100% OA system and multizone, I have to use Ev=1.
Now, let´s go to the question, I have a single AHU that serves more than one zone (Offices, Meeting rooms, Corridors and Restrooms). The restrooms are not considered in the Table 6-1 (Standard 62.1-2007), should I consider them? If yes, which values should I assume for Rp and Ra? In the italian norm, it´s considered that the restrooms may have only exhaust air and not supply air. (They must be underpressure, so the bad smells don´t arrive to the offices) How can I do?
Thank you very much in advanced.
Claudia.
Carrie Lai
26 thumbs up
July 13, 2010 - 3:40 am
Hi Claudia, for restroom needs to comply with Table 4-Minimum Exhaust Rates. That means the exguast rate of restroom will be no less the rates in Table 4.
Claudia Rieger
15 thumbs up
July 13, 2010 - 4:52 am
Hi Carrie,
thank you for the answer. But how it is possible to take that in consideration in the on-line Template for IEQ-pr.1? This Prerequisite refers to the "Ventilation Rate Procedure". It calculates "the design outdoor air intake flow (Vot)" and that has nothing to do with the exhaust air, isn´t it?
So, I think that in this Prerequisite you should take in consideration only the supply air, isn´t it?
Thank you very much.
Carrie Lai
26 thumbs up
July 22, 2010 - 10:43 pm
Hi Claudia,
For some rooms, as showed in ASHRAE 62.1-2007 Table 6-4, the designer should consider the exhaust rates. The Prerequisite not only requires the supply air, but also the exhaust air for some spaces, e.g. toilets. You could find some help in the following website: http://green.harvard.edu/theresource/leed-submit/nc/
Hope this will help.