[Equest-users] U values for fenestrations

Nikola Kravik NKravik at willdan.com
Thu Dec 29 07:02:46 PST 2011

Hi Ali,
You may want to check the Windows 6 program from LBNL on the following link and play with the windows and framing for your checks.


Nikola Kravik, LEED AP 
Project Engineer

Willdan Energy Solutions
11875 Dublin Boulevard, Suite A-201
Dublin, California 94568
T. 925.556.2600 ext. 1228
C. 925.719.5883
F. 925.556.1444
nkravik at willdan.com

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Ali Murat Tanyer
Sent: Thursday, December 29, 2011 5:32 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] U values for fenestrations

Dear all,

I am trying to understand the best way to enter the U value of my 
fenestrations as a whole system. The manufacturer specified the U value 
of the glazing as 0.49 BTU/hr·ft2°F and the aluminium framing as 0.70 
BTU/hr·ft2°F. I do not have the NFRC data of my fenestration.

I can enter the properties of the glazing however I couldn't find a way 
to define the thermal properties of the aluminium framing. I have also 
checked the detailed mode screens.

The dimensions of the fenestration varies in different locations. So 
what is the best way to calculate and enter the U-factor for the overall 
fenestration area (including glazing and framing)?

My aim is making my simulation as accurate as possible since I want to 
compare the results with actual values.

Thanks in advance.

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