[Bldg-sim] LEED and infiltration

[Campion Mark]

You may wish to see the work that was done on this issue in the following report:

"Achieving the 30% Goal:  Energy and Cost Savings Analysis of ASHRAE Standard 90.1-2010"  Pacific Northwest National Laboratory May 2011

Mark Campion
Policy Analyst
Green Building Services
(503) 378-4530
mark.campion at state.or.us

OREGON
BUILDING CODES DIVISION
1535 Edgewater Street NW
PO Box 14470
Salem, Oregon 97309-0404

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Brian A. Turner
Sent: Tuesday, January 24, 2012 6:52 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] LEED and infiltration

All,

I am working on the design of a project which includes specification of an air barrier in the building envelope and post-construction testing to confirm its performance.  I would like to take credit for this in my energy modeling calculations for LEED EAc1.  I have seen previous discussions on this mailing list about the lack of a baseline number for air leakage in ASHRAE 90.1 Appendix G being an issue.  I am also aware of the fact that performing a precise simulation of infiltration for a building would be complex and take into account wind pressures/directions, building pressurization, massing, etc. etc.  However, page 36 of the Advanced Energy Modeling for LEED Technical Manual appears to reference a scenario in which credit can be taken for reduced infiltration, and there are CIRs that state that such credit can be taken if proper documentation is supplied.  My question is:  has anyone received a favorable review of an energy model that claimed savings due to reduced infi  ltration as part of LEED project documentation?  If so, what methodology/baseline data was employed?  Any insights would be greatly appreciated.

Thanks in advance,

Brian A. Turner P.E., CEM, LEED AP BD+C
Mechanical Engineer

CLARK NEXSEN
Architecture & Engineering
6160 Kempsville Circle Suite 200A
Norfolk, VA 23502
757.961.7991 Tel.
757.455.5638 Fax
bturner at clarknexsen.com
www.clarknexsen.com
_______________________________________________
Bldg-sim mailing list
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
To unsubscribe from this mailing list send  a blank message to BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG