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Windows must be ordered with the Enhanced Glass Package to get these ratings.
Architectural Testing, Inc. was contracted to perform R&D U-factor and SHGC computer simulations of the 1650 Powerweld Series Vinyl Slider in general accordance with the National Fenestration Rating Council (NFRC) to determine if the results achieve a U-factor and SHGC value of 0.30 or better. The results listed were to be used by the manufacturer to determine qualification of the American Recovery and Reinvestment act of 2009.
NFRC 100-2004: Procedure for Determining Fenestration Product U-Factors
NFRC 200-2004: Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence
Series/Model: 1650 Powerweld Series Vinyl Slider
Standard Size: 1500mm x 1200mm
The above testing was preformed to the NFRC standard test methods.
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