[Bldg-sim] existing envelope CIR

[Will Mak]

>From my understanding, to even apply for LEED you need to meet ASHRAE 90.1-2004/2007 compliance for envelopes, etc?

 

William Mak, LEED Green Associate
Mechanical Design Engineer

EPSTEIN
Architecture
Interiors
Engineering
Construction

600 West Fulton Street
Chicago, Illinois 60661-1259

D: (312) 429-8116
F: (312) 559-1217
E: wmak at epsteinglobal.com
W: www.epsteinglobal.com <http://www.epsteinglobal.com/> 

þ Epstein is a firm believer in sustainability. We ask that you please consider the environment before printing this e-mail.

 

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Marcus Sheffer
Sent: Monday, February 28, 2011 8:36 AM
To: 'Jackson, Alan'; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] existing envelope CIR

 

The CIR is wrong and is in direct contradiction to Appendix G and the Energy Modeling Guide for LEED.

 

I have never seen a reviewer cite this CIR in a review.

 

Marcus Sheffer

Energy Opportunities, Inc/a 7group Company

1200 E Camping Area Road, Wellsville, PA  17365

717-292-2636, sheffer at sevengroup.com <mailto:sheffer at sevengroup.com> 

www.sevengroup.com

 

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jackson, Alan
Sent: Monday, February 28, 2011 9:26 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] existing envelope CIR

 

Is anyone aware of this CIR being upheld?

 

12/10/2008 - Credit Interpretation Request

The team is requesting that you please verify the meaning of the sentence in ASHRAE 90.1, Table G3.1 regarding baseline

envelope requirements for existing buildings.."For existing building envelopes, the baseline building design shall reflect existing

conditions prior to any revisions that are part of the scope of work being evaluated". Please confirm if this means that the walls, roof,

windows, etc for the baseline is to be modeled to match the existing conditions NOT according to the values in Table 5.5-1 thru 5.5-

8.

2/20/2009 - Ruling

If an existing envelope component is untouched, the baseline is as that component exists. However, if an existing component is

modified, the baseline needs to meet the requirements for alterations in Section 5.1.3.

 

It indicates that when modifying the existing envelope, the baseline needs to meet the minimum requirements of Chapter 5.

 

Have users in the group received comments from the reviewers when trying to model modified envelopes at the existing performance values, because all language regarding this issue other than the CIR indicate that existing envelopes get to be modeled at existing performance conditions regardless of any alterations.

 

Thanks

 

Alan Jackson, LEED AP
HVAC Project Engineer / BIM Team Leader

KlingStubbins
2301 Chestnut Street
Philadelphia, Pennsylvania
19103

P 215.569.2900, ext. 3380
F 215.569.5963
E ajackson at klingstubbins.com <mailto:jdoe at klingstubbins.com> 
W www.klingstubbins.com <http://www.klingstubbins.com/> 

 

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