[Equest-users] dwelling unit / residential LPDs

[Nick Caton]

Hey Joe,

 

If you're looking to start somewhere...  I know the NEC (NFPA 70) lays
out a clear method of estimating dwelling unit lighting loads within
Article 220.  It starts off seeming high (3W/SF), but there are heavy
demand factors that vary with the total calc'd load following within the
same article: i.e. first 3,000 @ 100%... 3,000 to 120,000 @ 35% etc...

 

While I've yet to fall back on the NEC as an energy modeling resource,
I'm unaware of any better direct source for residential lighting
loads... I imagine if you dig hard enough, one of the ASHRAE handbooks
probably has something along these lines as well that might give you a
different sum.

 

I think ASHRAE Fundamentals does have a clear thing or two to say
regarding what percentage of the lighting load should end up in a space
vs. a plenum when you are talking about different lamp sources
(incandescent vs. CFL...) - something to be aware of if you want to
pursue this avenue.

 

~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 Joe
Snider
Sent: Tuesday, December 07, 2010 5:24 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] dwelling unit / residential LPDs

 

I have reviewed the archives and found a few threads on this topic but
couldn't find either good resolution, or a clear enough string to reply
to, so I thought I would re-post:

 

ASHRAE 90.1 App G doesn't let you include dwelling units in typical LPD
calcs.  They say you need to plug in the same number for both proposed
and baseline.

 

But you can apparently pursue exceptional calcs to justify any cost
savings in LEED.  But you need to show some kind of analysis as to how
you chose a baseline, such as a study or something presumably that shows
typical w /sf for residential.

 

We have worked very hard to reduce energy use in lighting in a few
high-rise residential projects and would like to be able to receive
credit for that on our energy model.

 

Has anyone been through this with USGBC and / or know of a good resource
for a baseline w / sf for residential?

 

In advance, thank you very much.  Great forum.

 

Sincerely,

 

Joe Snider

 

---

Joe Snider, AIA, LEED AP

 

SEQUIL Systems, Inc.

high performance sustainable structures

 

1 SE 4th Ave, Suite 205

Delray Beach, FL 33483

t: 561.921.0900

f: 561.208.6090

 

www.SEQUIL.com

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20101207/1f23ccb6/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 1459 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20101207/1f23ccb6/attachment-0001.jpeg>