So I'm sitting here with my paper manual J, and the spreadsheet downloaded from ACCA's website. I am trying to figure out what values to use for U, and HTM for custom sized European triple pane windows (looking at u PVC zola and intus as of now)
Intus is showing
NFRC results of 0.18-0.33 BTU/(hr.ft
2.F) on their website
Zola is showing "Overall U-value of 0.14BTU/hr.sqft", "glass U-value of up to 0.09BTU/hr.ft2", and "Performance of entire window
assembly shall be independently tested
and be a minimum of R-7 at a test size of
assembly shall be independently tested
and be a minimum of R-7 at a test size of
and be a minimum of R-7 at a test size of 1.23m x 1.48m"
I know that the glass is a better insulator than the frames, am I being too picky thinking that each different sized window should be entered with its own U and HTM?