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RE: [EnergyPlus_Support] EnergyPlus and NFRC-rated fenestration

Please note that NFRC ratings give performance (U-Factor and SHGC) for standard fixed size windows of various configurations as a comparison rating only.  Any window larger or smaller than the standard used for the rating will have different U-Factor and SHGC.  To be accurate, you need to model the individual window sizes with WINDOW 5 and THERM using the project glass and frame configurations and then import them to the Energyplus calculation.

Ned Lyon
Staff Consultant
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of boulder1259
Sent: Wednesday, March 05, 2008 11:28 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] EnergyPlus and NFRC-rated fenestration


Has anyone figured out an easy way to model NFRC-rated window assemblies (e.g., a window
assembly with a U-factor 0.67 and an SHGC 0.49)?

I know I can build such an assembly via trail and error in Window 5 and then import the
assemblies into EnergyPlus, but I'm hoping that a standard library of ASHRAE 90.1 compliant
windows is already available.

Thanks,
Greg



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