Showing Tag: " r-5" (Show all posts)

U.S. Department of Energy R-5 Volume Purchase Program

Posted by wit windows on Friday, September 2, 2011, In : R-5

What is an R-5 Window?
R-5 windows are highly insulating windows with a whole-window R-value of 5 (or a U-factor of around 0.2) and are the top tier of energy-efficient windows for cold and mixed climates available today.

What is an R-value and U-factor?
An R-value indicates an insulation's resistance to heat flow. So, the higher the R-value, the greater the insulating effectiveness. U-factor is the inverse of R-value. So, the lower the U-factor, the better the thermal performance of the...
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Plygem R-5

Posted by wit windows on Saturday, August 27, 2011, In : Ply Gem

R-5 configuration now available nationwide on Ply Gem Windows products

High performance beats Energy Star

Ply Gem high performance R-5 windows are highly insulating windows with a whole window R value of 5 (a U-factor of around .2) These products are the top tier of energy efficient windows.

Energy Star windows have a U-factor of around .3. Reducing the U-factor from .3 to .2 with high performance R-5 windows reduces average heat loss through the window by more then 30% and saves the cons...