[Equest-users] Glazing distributed uniformly in horizontal bands

Brett Fero bfero at robsonwoese.com
Thu Oct 23 14:17:44 PDT 2008

I agree with David S Eldridge.  I was told this at an ASHRAE sponsored
seminar for exceeding the requirements of Standard 90.1-2007.  The speaker
was on the revisory committee.  If any addendum is used (i.e. Addendum a),
then all aspects of that addendum must be applied consistently throughout
for LEED.  The USGBC must also be notified.  



Brett Fero, P.E., LEED AP

RobsonWoese, Inc.

Syracuse, NY 13212

 <mailto:bfero at robsonwoese.com> bfero at robsonwoese.com


From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of David S
Sent: Thursday, October 23, 2008 3:56 PM
To: equest-users at onebuilding.org
Subject: Re: [Equest-users] Glazing distributed uniformly in horizontal


I believe the wording is for the entire single addenda - you don't have to
use a and b to use c, but if c has three parts you have to use all three.


"if a project team elects to use an addendum to an ASHRAE standard, this
addendum must be applied to the entire LEED submittal"




From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Steve
Sent: Thursday, October 23, 2008 2:51 PM
To: Bishop, Bill
Cc: equest-users at onebuilding.org
Subject: Re: [Equest-users] Glazing distributed uniformly in horizontal



I found this CIR, which should help to clarify whether or not you can use
the addenda.  It seems like you should be fine with using just that one part
of the addenda.

20/2007 - 

Credit Interpretation Request
The intent of this credit is to "Achieve increasing levels of energy
performance above the baseline in the prerequisite standard to reduce
environmental and economic impacts associated with excessive energy use."

The requirements of Option 1 of this credit are as follows:
- Demonstrate a percentage improvement in the proposed building performance
rating compared to the baseline building performance rating per ASHRAE/IESNA
Standard 90.1-2004 (without amendments) by a whole building project
simulation using the Building Performance Rating Method in Appendix G of the

Table G3.1, number 5.c. in Appendix G of the Standard concerns vertical

The baseline requirement is as follows:
- Vertical fenestration areas for new buildings and additions shall equal
that in the proposed design or 40% of the gross above-grade wall area,
whichever is smaller, and shall be distributed uniformly in horizontal bands
across the four orientations.

The exception that we would like to take is as follows:
- The intent of the baseline requirement is to encourage thoughtful
fenestration orientation and glazing percentage of a building that results
in energy savings. The Project is an exception to this approach.
- The facility exists for the purpose of sports viewing. The field-side
glazing exists in order for the facility to function as intended.
- The exterior walls of concessions, restrooms, and other ancillary spaces
typically do not have glazing. Concessions and restrooms are typically
semi-heated only. Modeling the baseline with glazing distributed over the
concessions and restrooms doesn't seem to meet the intent of the Standard.
- We would like to model the baseline building performance and the proposed
building performance with the same vertical fenestration-the actual building
fenestration. We ask that this exception is made for the project. 



5/13/2007 - 

The baseline and the proposed design can be modeled with the windows
distributed around the building as in the proposed design. The baseline
cannot have more than 40% window area as a percentage of total wall area. As
posted on the USGBC website, project teams can use addenda in the most
recent Supplement to the ASHRAE standards (see
http://www.usgbc.org/ShowFile.aspx?DocumentID=2664). Addendum A documents
this change.


Steve Mignogna

On Thu, Oct 23, 2008 at 11:44 AM, Bishop, Bill
<bbishop at pathfinderengineers.com> wrote:



I believe you are referring to the Addenda a - G4.1c to ASHRAE 90.1-2004. I
have not reviewed all of the ASHRAE addenda, and the USGBC requires an
ASHRAE addendum to be applied to the entire LEED submittal (per this
document http://www.usgbc.org/ShowFile.aspx?DocumentID=2664), so I have been
sticking to 90.1-2004 without addenda. If anyone has an opinion on whether
or not to use the addenda for LEED, please share.


However, I also am doing modeling for New York State Executive Order 111,
which requires me to use the modeling requirements from the Energy
Conservation Construction Code of New York State (ECCCNYS). New York
apparently has not gotten the "uniform distribution not required" memo.


Is there a list of all the DOE-2 commands somewhere? It would be helpful for
deciphering my .pd2 file.





From: Steve Mignogna [mailto:smignogna at gmail.com] 
Sent: Thursday, October 23, 2008 11:23 AM
To: Bishop, Bill
Cc: equest-users at onebuilding.org
Subject: Re: [Equest-users] Glazing distributed uniformly in horizontal



The uniformly distributed requirement has been changed.  You do not need to
do that anymore. As long as you have under 40% glazing you will not need to
change the area or locations of your glazing.  Hope that helps.


Steve Mignogna
Atelier Ten

On Thu, Oct 23, 2008 at 11:04 AM, Bishop, Bill
<bbishop at pathfinderengineers.com> wrote:



I want to modify the windows in an existing model so that they meet the
uniformly-distributed requirement. I'm trying to do this in the wizard, and
I know I will lose data from the detailed edit mode, which I will deal with.
However, I already used the "custom window/door placement" tab, and this
seems to override my desire to use the % window method. How do I "undo" the
custom windows/doors? Modify the .pd2 file?




William Bishop, EIT, LEEDR AP | Pathfinder Engineers LLP

Mechanical Engineer


3300 Monroe Ave., Suite 306 
Rochester, NY  14618

TEL (585) 218-0730 Ext. 114
FAX (585) 218-0737 

bbishop at pathfinderengineers.com



P Please consider the environment before printing this email


Equest-users mailing list
To unsubscribe from this mailing list send  a blank message to

Steve Mignogna
Atelier Ten

Steve Mignogna
Atelier Ten

This Email has been scanned for all viruses by PAETEC Email Scanning
Services, utilizing MessageLabs proprietary SkyScan infrastructure. For more
information on a proactive anti-virus service working around the clock,
around the globe, visit http://www.paetec.com.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20081023/a9c69761/attachment-0002.htm>

More information about the Equest-users mailing list