I had a new home in bluffton sc which has silverline 2900 series single hung windows of various sizes. Model total visible glass width shoulder cord height width height width height width height sq. Silverline 2900 windows reviews the silverline 2900 vinyl window comes standard as a single hung and offers the following performance numbers assuming the upgrade to the low e2 glass ai 0 13 vt 0 58 shgc 0 34 u value 0 35.
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