[Bldg-sim] LEED Kitchen/Laundry HVAC Systems

[Paul Riemer]

Rob,
There multiple LEED manuals for multiple LEED programs.  LEED 2009 for Commercial Interiors credit EAc1.3 Optimize Energy Performance - HVAC does reference the Energy Cost Budget Method. Previous versions of LEED NC & CI have also referenced the ECB method.
I did not see if you stated which LEED version applies but that will be important.
Good luck,

Paul Riemer, PE, LEED AP BD+C
DUNHAM

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Patrick J. O'Leary, Jr.
Sent: Thursday, December 01, 2011 8:11 AM
To: Reba Schaber
Cc: bldg-sim at lists.onebuilding.org; Fred Betz
Subject: Re: [Bldg-sim] LEED Kitchen/Laundry HVAC Systems

just as a reminder on using interpretations for 90.1 Chapter 11, which is the Energy Cost Budget (ECB) method, that Chapter 11/ECB methodology is not acceptable for leed projects.

per the leed 3.0 manual (page 263, section 4, last sentence of 1st paragraph):

"A model using the energy cost budget method will not be accepted."

per the leed 2.2 manual, page 177, left column, 2nd full paragraph, last sentence,

"A model using the Energy Cost Budget Method will NOT be accepted for credit under EA Credit 1."


On 11/21/11 8:06 PM, Reba Schaber wrote:
I don't have anything from USGBC, but I have some history from ASHRAE.  There are a series of interpretation requests to ASHRAE 90.1 about how handle AC systems serving primarily process loads.  It is clear that ASHRAE considers AC systems serving primarily process loads exempt from requirements of ASHRAE 90.1.  Since they don't have to meet minimum efficiencies, they need to be modeled the same when demonstrating compliance with ASHRAE 90.1.  See interpretation 4 about a theoretical central plant that is used mainly for IT cooling.

"The central plant is exempt from the requirements of Standard 90.1 and should be identical in both the Proposed Building Design and Budget Building Design."

The interpretation is worded for Chapter 11, which is another means to show compliance to the standard.  However it is interesting to note they are no longer applying this interpretation to Appendix G of 90.1-2007.  This seems like a logical progression sense Appendix G is meant to show energy efficiency not compliance.

"This interpretation also applies to Section 11 of 90.1-2007 as well as Appendix G of 90.1-2004 but does not apply to Appendix G of 90.1-2007."

Perhaps that knowledge may be helpful.

~Reba



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20111201/48b7baf3/attachment-0002.htm>