[Bldg-sim] multiple wall constructions for LEED

Aulbach, John jaulbach at nexant.com
Mon Aug 11 14:28:44 PDT 2008

Hi Chien Si !!
I believe you need only put in the one ASHRAE 90.1 minimum wall U-value.
Exactly what Table 5.5 asks for.
John R. Aulbach, PE, CEM
Project Manager
Nexant, Inc.
701 West Kimberly Ave., Suite 245
Placentia, CA 92870-6342 USA
Phone: 714-524-4402
Fax: 714-524-4407
email: jaulbach at nexant.com


From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Chien Si
Sent: Monday, August 11, 2008 2:21 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] multiple wall constructions for LEED

Hi all-
A quick, but kind of hazy question for me at least, regarding LEED
projects.  Let's just say, that a building is composed of multiple wall
types, spanning a range of the ASHRAE 90.1 definitions...some portions
of the building is steel framed, another portion is mass wall, and yet
another portion is wood framed, for example.  In this case, what would
the baseline be defined as?  Does each wall remain categorically intact,
and you simply choose the baseline U-factor that corresponds to that
wall type, or do you have to determine the wall type that makes up the
majority of the proposed building, and choose this wall type as the
baseline wall type?  
Thanks in advance,
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