Liebler
Basic Member
Posts:334
 |
| 04 Mar 2014 01:50 PM |
|
Has anyone used these windows? I've just found them and they appear to be about as good as it gets these days. They claim r5 for the operable and r6 for the fixed units. The secret is, no doubt, in 1 3/4" triple glazing. They appear to use aluminum extrusions with a plastic thermal break.
|
|
|
|
|
|
|
Lee Dodge
Advanced Member
Posts:714
|
| 04 Mar 2014 04:03 PM |
|
According to NFRC testing, it looks like the lowest U-values for Wausau's INvent PLUS fixed frame windows are 0.16 (R=6.25), but the SHGC are relatively low, 0.18 or 0.27, and the corresponding visual transmissions are 0.39 and 0.48. So the windows have excellent U-values, but relatively low solar gain, suitable unless high solar gain windows are part of the house design. The visual transmission of 0.39 would be low for some tastes.
The U-values for their high solar gain windows of that series are unimpressive. |
|
Lee Dodge,
<a href="http://www.ResidentialEnergyLaboratory.com">Residential Energy Laboratory,</a>
in a net-zero source energy modified production house
|
|
|
ricky_005
Basic Member
Posts:313
|
| 04 Mar 2014 04:30 PM |
|
Price per square foot? |
|
|
|
|
greentree
Advanced Member
Posts:587
|
| 26 Apr 2014 11:45 PM |
|
This is a product from a commercial curtain wall firm, they aren't in the residential market. |
|
|
|
|