[bldg-sim] eQUEST window baseline

Mike Tillou miket at etcgrp.com
Thu Feb 15 12:46:35 PST 2007


Mitchell,
 
Is that official or unofficial news from USGBC?  As far as I understood
LEED 2.2 is using the version of Appendix G as written in ASHRAE
90.1-2004 without addenda.  The change in Appendix G allowing you to use
the actual window placement rather than equal banding on each facet was
changed via ASHRAE addendum A in 2006 which means it would NOT apply to
LEED 2.2 projects.
 
Here is the email response I got last month when I asked a member of the
EA-TAG whether Addenda to 90.1-2004 applied to LEED 2.2. " Unfortunately
it stops at 90.1-2004 and does not include addenda.  The Reference Guide
explicitly states "90.1-2004 (without amendments)"."
 
Is there anyone from USGBC that can clarify this?
 
Mike

Michael Tillou, PE 
ETC Group - Energy Engineering for a Sustainable Future 
Ph:413-458-9870 

	-----Original Message-----
	From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of
Mitchell Dec
	Sent: Thursday, February 15, 2007 12:54 PM
	To: bldg-sim at gard.com
	Subject: [bldg-sim] eQUEST window baseline
	
	
	From what I have been told by a member of the EA TAG is that the
horizontal bands are no longer required. You can place the windows
as-designed and run the baseline with the same windows (as long as you
do not exceed 40% window-to-wall ratio). 

		-----Original Message-----
		From: bldg-sim at gard.com [mailto:bldg-sim at gard.com]On
Behalf Of Andy McNamara
		Sent: Thursday, February 15, 2007 9:39 AM
		To: bldg-sim at gard.com
		Subject: [bldg-sim] eQUEST window baseline
		
		
		Hello,
		
		I am creating an energy model for a LEED project.  In
"baselining" the building, one of the stipulations of ASHRAE 90.1 2004
is that the windows must be evenly distributed in horizontal bands on
each facet of the facade.  My building has 17 facets due to a somewhat
complicated design and I am wondering if anyone knows a relatively
straightforward way to accomplish that distribution.  One of my problems
is that in the Design Development Wizard, there are only 4 areas in
which to enter percentages (N., E., S., W.) which doesn't seem to work
on a building with so many facets.  On the other hand, it seems tedious
to go into each window and adjust its percentage.  Is there a more
elegant way to adjust window proportions globally?  I am thinking a
parametric run might be the best solution.  Can anyone provide some
insight on this?
		
		Thank you!
		Andrew McNamara
		
		

	
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