[Equest-users] Glazing distributed uniformly in horizontal bands

[David S Eldridge]

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 Mignogna
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 bands

Bill-

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 Standard.


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

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 -

Ruling
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<mailto:bbishop at pathfinderengineers.com>> wrote:

Steve,



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.



Thanks,

Bill

________________________________

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



Bill-

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.

Regards,

--
Steve Mignogna
Atelier Ten


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

All,



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?



Bill



William Bishop, EIT, LEED(r) 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<mailto:bbishop at pathfinderengineers.com>



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--
Steve Mignogna
Atelier Ten



--
Steve Mignogna
Atelier Ten
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