[Equest-users] Glass center-of-glass to assembly U-Value?

[Srikar Kaligotla]

Josh,

You could probably use ASHRAE fundamentals Handbook to get the assembly
U-values. Go to Fenestration (or 29th Chapter) and look for Table 5
(U-factors for Various Fenestration products) this is from an older version.


Regards 

Srikar R Kaligotla 
Design Engineer
HVAC Dept. 



  _____  

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Josh
Greenfield
Sent: Monday, September 22, 2008 12:07 PM
To: bldg-sim at lists.onebuilding.org; equest-users at lists.onebuilding.org
Subject: [Equest-users] Glass center-of-glass to assembly U-Value?

 

Does anyone have any rules of thumb on a quick/easy approximation for taking
a Center-of-Glass U-value and converting it to an Assembly U-value based on
industry standard assembly constructions?  I know this depends on a lot of
variables, like frame material and conductance, and the size of the overall
glass assembly, etc., but I'm just looking for a quick estimate on
performance reduction for comparisons to other window types for a particular
building.

 

Also, is there an ASHRAE 90.1-2004 Baseline glass Visible Light
Transmittance (VLT)?

 

Josh Greenfield, PE, LEED AP
Senior Associate
Primera Engineers, Ltd.
100 S. Wacker Drive, Suite 700
Chicago, IL 60606
312.606.0910 Main
312.242.6392 Direct
312.606.0415 Fax
 <blocked::mailto:jgreenfield at primerachicago.com>
jgreenfield at primerachicago.com
 <http://www.primerachicago.com> http://www.primerachicago.com

Be Green...please consider the environment before printing this email.







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