Hi all,
have you ever calculated the SHGC of a whole product using spreadsheet and not Window7?
Using the following formula
of the NFRC Simulation manual (pag.8-246), the U-factor of frame to consider is the one obtained (with Therm) with boundary conditions for SHGC:
Tout = 89.6°F and hc=2.64 (wind speed 6.15mph)
Tin = 75.2°F
or do I have to consider the boundary conditions:
Tout = -0.4°F and hc=4.579 (wind speed 12.8mph)
Tin = 69.8°F
and then apply hc = 3.63Btu/h.ft2.K (20.6W/m2-K) in the formula?
I hope someone can clarify it to me.
Thank you in advance.
Regards,
A.