Testing in a few days and was hoping anyone had examples of how to use this equation:
(U-w x A-w) + (U-op x A-op) / A-total wall
And if you need the R-Value remember that R = 1 / U Value.
Is it as simple as the (U value of the window x the area of the window ) + (U value of the opaque portion of the wall x the area of the opaque portion of the wall) / the total wall area?
If so assuming the area of the windows and area of the opaque portion should add up to total wall area, correct?
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