Windquest
Kolbe's Windquest Series Energy Performance (EP) windows exceed 2010 Energy Star criteria for all U.S. climate zones. Available as casement, awning and studio windows, they feature a 1.25-inch, triple glazing system. The windows have U-values of 0.18/.19, R-values of over 5 and a Solar Heat Gain Coefficient of .23. In addition, the units allow for a maximum air infiltration of only .01 cubic foot per minute.
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