[Bldg-sim] LEED modeling requirements for existing buildings
elo at MichaelsEngineering.com
Thu Aug 14 13:15:32 PDT 2008
Under ASHRAE 90.1 Appendix G, Table G3.1, Section 5, "Baseline Building
Performance" column, requirement (f) (take a breath...) it states that
"For existing building envelopes, the baseline building design shall
reflect existing conditions prior to any revisions that are part of the
scope of work being evaluated". So the rotation doesn't apply to you.
Also, I interpret that to mean the windows don't need to be
redistributed either. Hope that helps!
Energy Division - Michaels Engineering
811 Monitor St. Ste 100
La Crosse, WI 54603
v: 608-785-1900 x521
elo at michaelsengineering.com
From: Mark Sorensen [mailto:DEnergyServices at comcast.net]
Sent: Thursday, August 14, 2008 10:40 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] LEED modeling requirements for existing buildings
When modeling an existing building, is required to calculate the
proposed building window to wall ratio and equally redistribute the
glass area to the baseline building and prepare models for the four
rotation exposures? My take is that for a proposed existing building,
there is not an opportunity to position the building to the most
advantageous exposure and you could end up being penalized if the
baseline energy use is averaged for all rotations but I have not been
able to find any reference in LEED or ASHRAE to support this. I'm not
sure what to think about equal redistribution of the glass areas.
Diversified Energy Services
5890 E. Pontaluna Rd.
Fruitport, MI 49415
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Bldg-sim