September 9, 2010
Manufacturers need to examine numerous production and market considerations for both approaches
It is certainly evident that the North American window industry is on a charted path toward improved energy efficiency. In fact, it appears to be moving toward common standards for both new construction and remodel and replacement markets. These markets are converging near a future recommended R-5 rating–or U-values of 0.22 for operable windows and 0.20 for non-operable windows. This...