Value of i89Coating in Triple-Pane Windows
Is there really much value to cardinal’s i89 coating when dealing with triple pane windows? I can see the benefit for double pane windows, but according to cardinal, the U value difference in 1-3/8” argon filled triple pane windows is only 0.01 — not much.
The data is here: https://www.cardinalcorp.com/technology/reference/loe-performance-stats/
I’m looking at the low-E 180 coating for the “regular” low-E coatings. I don’t have info yet on the price difference to add the i89 coating.
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