[Bldg-sim] ASHRAE 90.1 building rotation reasoning

Robby Oylear robbyo at rushingco.com
Tue May 12 11:05:29 PDT 2009


I think you’re mistaken.  You may be thinking of addenda a  which removes 
the requirement to spread all glazing equally across all orientations of the 
building.  Which addenda removes the requirement to rotate your building?



Robby Oylear, LEED® AP

Mechanical Engineer

direct: 206.788.4571

cell: 206.354.2721

www. <http://www.rushingco.com/> rushingco.com



From: bldg-sim-bounces at lists.onebuilding.org 
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Cramer 
Silkworth
Sent: Tuesday, May 12, 2009 11:02 AM
To: christopher.zabaneh at ibece.net
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] ASHRAE 90.1 building rotation reasoning



Christopher,



One of the addenda to 90.1 removes this requirement and the use of addenda 
is accepted by USGBC, so you don't need to waste your time.



-Cramer



J. Cramer Silkworth

Transsolar Inc.

Technical consulting for energy efficiency and user comfort in buildings. 
Stuttgart - Munich - New York

134 Spring Street Suite 601

New York, NY 10012

212-219-2255

silkworth at transsolar.com



  _____

   From: Christopher Zabaneh [mailto:christopher.zabaneh at ibece.net]
Sent: Tuesday, May 12, 2009 1:33 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] ASHRAE 90.1 building rotation reasoning

What is the original reasoning behind the ASHRAE 90.1 Appendix G building 
rotations through 0, 90, 180 and 270 degrees?



If the building is only going to have one orientation, why go through the 
trouble of rotating and averaging the building values when there should be 
only one base case?



Are steps being taken by ASHRAE or the energy modeling community to change 
this?



Thanks kindly,



Christopher F. Zabaneh

B.Sc.Eng, LEED® AP
IBE Consulting Engineers
14130 Riverside Drive, Suite 201
Sherman Oaks, CA 91423-2313
p    (818) 377-8220  X 295
f     (818) 377-8230
 <http://www.ibece.com/> IDEAS FOR THE BUILT ENVIRONMENT

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