[Equest-users] Lighting Power Density

[Nick Caton]

Hey Michael,

 

For perspective, if that's the only thing your reviewer can find to pick
on, then it's a sign you're doing well overall ;).

 

LPD calcs for prescriptive compliance strictly speaking should go to the
"center of the partition wall" (Re: section 9.6).  I would generally
draw a line through the center of a typical tight plumbing chase and
call the chase space part of the partition.  

 

If it is the sort of deep accessible chase with a door that you are
lighting with separate fixtures (or if I were really concerned about a
nitpicky reviewer) then I'd call it its own space (electrical/mechanical
- 1.5 W/SF, if it is a lit space) and draw centerlines in the
surrounding walls.

 

~Nick

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

Smith & Boucher Engineers

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of M.
Shields
Sent: Thursday, May 19, 2011 4:19 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Lighting Power Density

 

Good Afternoon All,

 

Hopefully this is a simple question.  I recently got comments back from
LEED questioning the lighting power density for some of the areas in my
Appendix G model.  The comments asked me to provide floor plans for the
areas in question.  I am using the space by space method which says area
should be calculated from the center of partition walls.  For the areas
in question some of the walls have a chase for plumbing, some have
structural columns, etc.  My question is this, in my model I did not
create separate zones are anything for this non habitable area, I just
have an interior wall.  Should the LPD be calculated to the center of
the chase?  To the center of the column?  The center of the wall
surrounding the chase?  None of these will make a significant impact on
my savings, however, I don't want the reviewer to reject my number
saying something such as "your floor plan included the chase when it
should have stopped at the center of the wall surrounding the chase"

 

Thanks for any opinions or experience getting something like this passed
by LEED.

 

____________________________
Michael Shields

Email: mshields at fstrategies.com

 

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