DOE Energy Star suggestion for windows in our part of Southern California (South-Central) is a U-Factor of less than or equal to 0.28, and a SHGC of less than or equal to 0.23. These windows were spec'd SIGNIFICANTLY above that level, because they likely will never be replaced again (at least, not by me). #energyefficiency#windows#remodelinghttps://efficientwindows.org/energystar/