[BLDG-SIM] glass u-vals

[Marcus Sheffer]

Call the manufacturer.  They should be able to give you whole unit U-values
for standardized window sizes.
 
I think that Window5 software from LBL can do this as well but a phone call
is quicker.
 
Marcus Sheffer
Energy Opportunities, Inc/a 7group Company
1200 E Camping Area Road, Wellsville, PA  17365
717-292-2636,  <mailto:sheffer at sevengroup.com> sheffer at sevengroup.com
www.sevengroup.com
 
  _____  

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Dahlstrom,
Aaron
Sent: Tuesday, April 17, 2007 11:24 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] glass u-vals
 
ASHRAE 90.1 window U-vals are for the "assembly."
Manufacturer's data for my project is for "center of glass."
 
Is anyone familiar with a way to get from one to the other?
 
I have a frame type and u-value; however, Fund. Chap 31 seems to caution
against doing hand calcs due to edge-of-glass effects.
 
Thanks,
 
Aaron Dahlstrom
AKF Engineers, LLP
1500 Walnut Street, Suite 1400
Philadelphia, PA 19102 
Phone:   (215) 282-2169
Fax:        (215) 735-6706
 <http://www.akf-engineers.com/> www.akf-engineers.com
 
 
 
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