Replies

1. 
   razzman | Mar 12, 2006 05:26am | #1

   bump

   'Nemo me impune lacesset'
   No one will provoke me with impunity

2. 
   GaryGary | Mar 12, 2006 07:19am | #2

   Hi,
   I would ask them what the NFRC label on the window reads for U value (1/R), and then compare that to other windows at http://www.EfficientWindows.org

   This gives you an apples to apples way to compare it to other windows.

   Gary
   http://www.BuildItSolar.com

1. 
   paul42 | Mar 12, 2006 07:40am | #3

   According to their web site, the U factor is .10 and that is quite a bit better than anything listed on the http://www.efficientwindows.org web site.However, there is more to a window than U factor. I'm looking for somebody that has actually installed them.

1. 
   GaryGary | Mar 12, 2006 08:28am | #4

   Hi,I guess my question was is their R10 rating the NFRC rating?
   You can (for example) get a much higher R value by testing the center of the window vs testing the whole window including the edges. The NFRC has a standard method of testing that allows comparing different windows on an apples to apples basis. An NFRC rating of R10 would really be OUTSTANDING!!!Gary

1. 
   paul42 | Mar 13, 2006 05:02pm | #5

   I think the lack of responses is telling in its own way.

   If nobody is using them, then the price to performance is out of whack or they just aren't all that great of a window.