[Bldg-sim] Appendix G - Base Case Orientations and Glazing

[James Hansen]

This is an interesting discussion (one that may have already occurred
previously).  According to the 90.1 User Manual:

 

"SHGC - The budget building design's fenestration solar heat gain
coefficient is set to the maximum required for the climate.  The
prescriptive standards give SHGC criteria for all orientations and
provide an exception for north facing fenestration.  The exception is
not used for the baseline building; the criteria for all orientations
are used for all orientations..."

 

However, even the LEED-NC EAc1 template differentiates between the North
SHGC and the rest of the fenestration....if the exception is not to be
used, why would the USGBC have a place to enter the SHGC(north) for the
baseline building??  And why would they accept two different SHGCs for
the baseline building on the template?

 

I can't seem to find any NC or CS CIRs that address this.

 

GHT Limited
James Hansen, PE, LEED AP

Senior Associate

1010 N. Glebe Rd, Suite 200

Arlington, VA  22201-4749

703-338-5754 (Cell)

703-243-1200 (Office)

703-276-1376 (Fax)

www.ghtltd.com <http://www.ghtltd.com/> 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ulrik
Welle-Strand Horn
Sent: Monday, December 01, 2008 9:42 AM
To: Paul Riemer
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Appendix G - Base Case Orientations and Glazing

 

Paul, 

That's a VERY valid point. Thanks for pointing it out.


Ulrik Welle-Strand Horn 
Sustainability Engineer


Silpa Inc.
s i m p l e  .  s c i e n t i f i c  .  s u s t a i n a b l e

AMERICAS | MIDDLE EAST | ASIA
www.silpainc.com <http://www.silpainc.com/> 


India: +91.90080.96083

On Mon, Dec 1, 2008 at 7:51 PM, Paul Riemer <Paul.Riemer at dunhameng.com>
wrote:

I read Table G3.1 section 5 sub item (c) under the baseline building
performance column to require use of the "SHGC_all" for all vertical
glazing.  Have others read that and reached a different conclusion?  Did
I miss an addenda? or a CIR?

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of James V.
Dirkes II P.E.
Sent: Monday, December 01, 2008 8:09 AM
To: 'Ulrik Welle-Strand Horn'; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Appendix G - Base Case Orientations and Glazing

 

Dear Ulrik,

 

Since the intent of the Standard is to assign the better glazing
performance to non-North walls, I always rotate the glazing
characteristics with the building. (e.g., I assign the "North" glazing
characteristics to the elevation that, after rotating, faces North)

 

The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653

 

 

 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ulrik
Welle-Strand Horn
Sent: Monday, December 01, 2008 7:30 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G - Base Case Orientations and Glazing

Dear all,

When you are rotating the building through 4 different orientations, do
you change the glazing so that the glazing with the highest SHGC is
always faces north, or do you put the glazing with high SHGC on the
original north facade, and then rotate the building so that the high
SHGC glazing faces the east, south and west orientations in subsequent
simulations?

Yours faithfully,


Ulrik Welle-Strand Horn 
Sustainability Engineer


Silpa Inc.
s i m p l e  .  s c i e n t i f i c  .  s u s t a i n a b l e

AMERICAS | MIDDLE EAST | ASIA
www.silpainc.com
<http://console.mxlogic.com/redir/?1psKUPuX9JdZZWXPPxI05ihWSOxrBYdTdTdA3
Q29uABiV2Hsbvg57OFeDlxV1KhW4E4u00CTHFK6QkQTAmbI3APrypI5-Aq83iScDE4iZ9aCB
QQg22OTMgA7Cy096y0Kq81Dquq81bquq80N6nMDIVlxgQgr10Qg18_hik29KvxYY1NJ4Syrj
vvuKYYYrV6r6> 


India: +91.90080.96083

 


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