[Bldg-sim] LEED EaC1

Sarah Moore sarah.moore at arup.com
Tue Jan 27 09:28:55 PST 2009


Tim, all,
 
Yes, my experience has shown that the local Washington State Energy Code
is in general better than ASHRAE 90.1.  More specifically, buildings
built under the Seattle Energy Code can typically achieve 10-20% savings
without a lot of additional energy conservation measures.
 
Obviously it depends on the building type and architecture.  The system
you describe would probably do great in a mixed-use high rise with
plenty of diversity and a "reasonable" amount of glass within the 40%
ASHRAE boundary.  The story might be different, however, in a building
with 70% glazing and little or no diversity.  Even so, it seems like
there would have to be some fairly significant energy penalties outside
the mechanical system for WSHPs + Condensing Boilers to be only 5%
better than gas furnaces.
 
______________________ 
Sarah Moore 
Arup 
206 493 2246 
 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Tim Dion
Sent: Tuesday, January 27, 2009 8:47 AM
To: 'bldg-sim at lists.onebuilding.org'
Subject: [Bldg-sim] LEED EaC1


I've been hearing from a number of sources that you can get 2 EaC1 LEED
points under NC 2.2 just by modeling a State Code Building against an
ASHRAE Appendix G Baseline building.
 
This has not been the case with any of the LEED simulations I've done
with eQuest. Typically a Washington Energy Code 2006 building against an
ASHRAE Appendix G building comes in with an energy cost reduction of
about 5%, which doesn't achieve 1 point. This is typically with a Design
system consisting of WSHPs served by a central condenser water plant
with dual condensing boilers and a fluid cooler vs a Baseline system
consisting of PSZ DX Cooling, Gas Furnace Heat. 
 
I'm curious what others have experienced in this regards.
 
Tim Dion, LEED(r) AP 
Mechanical
HARGIS ENGINEERS 
600 Stewart Street 
Suite 1000 
Seattle, WA 98101 
www.hargis.biz <http://www.hargis.biz/>  


 
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