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[EnergyPlus_Support] Calculation of U-value

Hello everyone,

I'm in the process of filling out the table 1.4 for LEED EAp2 submission, my question is about this ''How were the Proposed case framed assembly fenestration U-factors determined?'' along with the following options:

* NFRC testing for site-assembled fenestration
* NFRC testing for manufactured fenestration assemblies
* Table A8.2 (windows) and Table A8.1 (skylights)
* LBNL Window 5 or Window 6 calculations
* Energy simulation includes separate frame and glazing

Normally the U-value I have for the projects I'm working on, doesn't include framing, just the glazing (please confirm if this always happen in the technical sheet of the glazing). 

Please help me figure out the meaning of the previos options and give me a big picture about how different would be considering the framing in relation to not considering it.

Thanks in advance.


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