[Greenbuilding] apples, oranges, and u values

[Reuben Deumling]

On Thu, Apr 12, 2012 at 9:41 AM, Alan Abrams <alan at abramsdesignbuild.com>wrote:

> Euro UPVC 3x tilt-turn
>

Alan,
are you finding those stateside? From whom and for how much? What are they
made of? I am not familiar with the acronym, but tilt-turn rings all sorts
of bells.

Thanks.
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