[Equest-users] Gross vs. Conditioned Square Footage

[The Watt Doctors - Dave Weigel]

Hi Bernie,

In my opinion, the reviewer is correct. While table G3.1.1A does not explicitly use the term “gross square footage,” the left hand column says Building Type.  There is no reference to heated/cooled square footage, only to building square footage. Perhaps this could be clarified in future 90.1 releases, but I believe that gross square footage is implied.

Best to you,

Dave

David R. Weigel, PE
Managing Member
1189 Golden Circle SW,  Lilburn GA 30047
678-353-6394 office       901-619-1716 cell
 


From: Bernie Hont 
Sent: Monday, August 11, 2014 5:09 PM
To: equest-users at lists.onebuilding.org 
Subject: [Equest-users] Gross vs. Conditioned Square Footage

Per 90.1, G3.1.1 the baseline system shall be based on… number of floors, conditioned floor area… etc.

 

I have a 5 story building with a total gross square footage of ~153,172 square feet. I received a LEED review comment (LEED 2009) that states the baseline system should be system 8 rather than system 6 (as I have modeled). The SVA report indicates the floor area as 153172 square feet, but the LSC report indicates the conditioned area as 144775 square feet for calculations. Supply/return shafts, elevator shafts, etc are excluded from conditioned floor area as well as wall thicknesses. Is the use of system type 6 appropriate since the conditioned floor area is less than 150,000 square feet or, as the comment suggests, should the baseline system be changed to system 8 since the gross area exceeds 150,000 square feet? Changing the system type will substantially impact the savings as the proposed system is a packaged rooftop unit rather than a chilled water plant.

 

Thanks

 


     Bernie Hont, PE, LEED AP

      Girard Engineering, P.C.

      7600 Leesburg Pike

      West Suite 310

      Falls Church. Virginia 22043

      703.442.8787 (T)

      703.734.3946 (D)

      703.356.0169 (F)

      www.girard.com
     

 



 
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