[Equest-users] Gross vs. Conditioned Square Footage

Oscar Buchely obuchely at ses-ingenieria.com
Tue Aug 12 14:22:53 PDT 2014


Hi Berine

I think you are right you could argue that according to 90.1, G3.1.1 the 
baseline system shall be based on… number of floors, conditioned floor 
area… etc
Also in 90.1-2007 User Manual pag G-22 said:

For nonresidential building the baseline building system type depended 
not only  on the heating source for the proposed building, but also on 
the number of floors and the total CONDITIONED floor area of the building.

I would show in a drawing the areas that are excluded (not conditioned) 
to the reviewer.

Good luck.

MSc Oscar Buchely
Ingeniero de Proyectos
Soluciones Energéticas Sostenibles
www.ses.uno
Bogota - Colombia
Tel +5714028895

On 12/08/2014 03:15 p.m., The Watt Doctors - Dave Weigel wrote:
> 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
> wattdoxemailsiglogo(transparent_gif)[1]
> *From:* Bernie Hont <mailto:bhont at girard.com>
> *Sent:* Monday, August 11, 2014 5:09 PM
> *To:* equest-users at lists.onebuilding.org 
> <mailto: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
>
> Girard Logo
>
> 	
>
> 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 <http://www.girard.com/>
>
> View my profile on LinkedIn <http://www.linkedin.com/in/berniehont>
>
>
>
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