[Bldg-sim] App G system type 6 story 100,000 sq ft building

James Hansen JHANSEN at ghtltd.com
Fri Nov 7 07:08:03 PST 2008

I searched thru the archives but couldn't fiind an answer to this.  
Why is there a direct conflict in the required Baseline system type between the App G chart in 90.1 and the wording in the 90.1 user manual?
I have a 6-story building that is 100,000 sq ft.  If I read Table G3.1.1A of 90.1, it says:
"Nonresidential & More than 5 floors OR > 150,000 sq ft", that I should use System 8 (VAV with PFP boxes).
Even Table G-A in the User Manual says the same thing.
In addition, the requirements for using System 6 say:
"Non residential, 4 or 5 floors or less than 75,000 sq ft OR 5 floors or less and 75,000 - 150,000 sq ft".
Both of these facts would lead me to believe that anything over 5 stories should be System 8.  However, the wording in the User Manual goes on to say that:
"For intermediate-sized buildings that are 4 or 5 floors and less than 75,000 sq ft or more than 5 floors and between 75,000 and 150,000 sq ft, the baseline building HVAC system for electric heat is packaged VAV system."
I've finished modeling the Baseline building with System 8, but now that I've read the User Manual, it would appear that I am supposed to use PVAV.  I really hope I don't have to go back and change the baseline system again.
Any thoughts?
James Hansen

The information contained in this communication is confidential, may be privileged, and is intended only for the use of the addressee.  It is the property of GHT Limited.  Unauthorized use, disclosure or copying of this communication or any part thereof is strictly prohibited and may be unlawful.  If you have received this communication in error, please notify me immediately by return e-mail or by e-mail to ght at ghtltd.com, and destroy this communication and all copies thereof, including all attachments.  Thank you.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20081107/22e86740/attachment.htm>

More information about the Bldg-sim mailing list