Room-Side Low-E – Worth It?
My wife and I have a 3200 square foot, two-story, colonial house in NJ (Zone 5), built in 1987. We will be replacing all windows this fall, and are leaning towards Marvin Integrity new construction windows. Current windows are Andersen 200 Series Narroline, circa 1986, with dual-pane clear glass. The house gets very little shade, and the back of the house faces south.
We’re thinking about speccing the following glass package for the new windows:
Surface 2 – Cardinal LoE-180 (except in our kitchen and bonus room, which are east and west facing and get really hot; these will get LoE-272)
Surface 4 – Cardinal LoE-i89
The idea here is to take advantage of solar heat gain in the winter to offset oil heating costs, understanding that we’ll take a slight energy hit in the summer vs. LoE-272, which seems to be the standard in our area.
1. What do you think of this approach? Does it make sense, or should we go with simple/inexpensive LoE-272 only, which seems to be the standard in our area?
2. Is the LoE-i89 a worthwhile upgrade? Will we notice the difference, both in terms of comfort and heating costs? The upcharge is around $300 per window because it’s a custom request. Our goal is to be in this house for a long time, so we want to “do it right,” but obviously don’t want to waste money on things that will make little difference.
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