Triple pane vs. double pane in Phoenix
Im at the point where I have to narrow down my material choices for my new home build. Im in PHX, living in a home built like this : https://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/why-are-houses-built-way . And its driving me nuts having to pay my electric bill every summer ($500 a month and thats with solar!!). Currently I have spec’d Intus triple pane windows (Vinyl Arcade line, not the higher end Eforte) for their U Factor (high 0.10’s). I’m the opposite of most as I am trying to block the introduction of heat through thermal transfer not the loss of it. Of course I will have as low of a SHGF as possible (Intus is 0.23). Speaking with a well respected window dealer in town, triple pane windows are almost none existent with locally available windows. Looking at Milgard’s exterior fiberglass, interior wood double pane windows, they seem very solid and are quite attractive. U-Factor in the high 0.20’s and a SHGF of 0.21. Pricing favors the top of the line Milgard windows by a couple thousand dollars. My question is, am I placing too much value on the triple pane window for my environment? The effort required to get the Intus window (12-14 week lead time) is a negative. Milgard’s lifetime warranty is also appealing, but Intus has quite the cult following due to their performance and quality.
As for my construction details, I will be full sheathed with particular attention to air sealing (hopefully can find a Fluid applied WRB installer) and will have a conditioned attic space.
As always, any opinions are much appreciated.
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