C&S ventilation

Randy Cook

Associate Director

The Rock Brook Consulting Group

LEEDuser Basic Member

6 thumbs up

September 19, 2012

Hello. I'm working on a C&S project and have a question regarding the documentation of the IEQp1 credit. During the design a single tenant was found to occupy the entire site (700k sf). We worked hand in hand to establish the AHU/RTU outside air quantities. I do not have a plan indicating the tenant's layouts. I also am not documenting the distribution ductwork on the floors. My question is how exactly to document the ventilation. I am thinking that I can do the 62.1 calcs, using a generic set of rooms (conference rooms, offices, lobbies) and drafting a narrative to explain my assumptions. Is there an issue if I use the ventilation calcs that the fit out engineer has developed for their layouts instead?

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Tristan Roberts

Representative

Vermont House of Representatives

LEEDuser Expert

7780 thumbs up

Fri, 12/14/2012 - 18:27

Randy, if you haven't already checked out CS Appendix 4 in the LEED Reference Guide, I think that offers one piece of the puzzle here.

Jean-Baptiste Noel

ESD Operations Manager

Green & Global Consulting Pte. Ltd.

LEEDuser Basic Member

4 thumbs up

Wed, 04/03/2013 - 05:13

I have the same question as Randy I think. If we do not account for the fit-out, and take the office space as a single zone, the fresh air requirements will be different than if we consider some meeting rooms etc. (with a probable fit out); I think that by taking in consideration that one AHU is supplying air to several rooms, meeting rooms can become critical spaces that will influence the minimum fresh air. I don't think this case is addressed in the reference guide, where the fresh air and AHU is taken care of in the C&S scope, but the ducting and terminal units design is still unknown.

Melissa Wrolstad

Senior Project Manager

CodeGreen Solutions

LEEDuser Basic Member

157 thumbs up

Wed, 09/25/2013 - 21:12

I just received a comment on a review saying that it is not acceptable to account for the entire office floor as "office space". Conference space areas must be approximated and included. I cannot find a LEED acceptable default value to use for % of office space that should be considered conference rooms. Does anyone have one? (This guidance is not included in the LEED Reference Guide Appendix 4).

R Jones

LEEDuser Premium Member

60 thumbs up

Thu, 10/03/2013 - 09:17

We have a similar issue in that our CS project is providing open office space and therefore 1 zone - we have provided a notional layout for the daylight and views and thermal control credits however these are only theoretical given that it is a Core and Shell building - are the reviewers expecting the ventilation rate calculations to be based on our theoretical notional layout or are there acceptable default %s that can be used for certain building types?