dual pane vs. triple pane
I have an estimate for Pella and Eagle casement windows. The Pella is for the Architect Series.
Eagle Axiom triple pane - 27,000
Pella Architect double pane - 30,000
I'm trying to compare apples to apples, but I'm not sure I'm finding the right numbers. I had not realized when my contractor gave me the numbers it was for a triple pane Eagle and a double pane Pella. (The Pella brochures do not have this info in them. Got it those numbers from Pella website)
Pella docs say
.28-.87 for the Architect series
.23-.49 for the Designer triple pane.
.31 for fixed casement
Eagle docs say:
.35 for the Eagle Axiom dual pane for moving casement
(I can't find the triple pane u-value)
.29 for fixed casement
This will be in a new construction house with lots of windows in cold freeze/thaw weather, so insulation value is important to me.
I'm going to get an estimate on the Pella triple panes, but I was told it was probably and upgrade of +$90 window.
I not concerned about: noise, sun, or blinds in the middle.
1. Has anyone else done the research and come up with the same u-value numbers?
2. Are the differences in u-value significant?