HiMark Windows Ratings
The following performance numbers are taken from the double hung window using the standard low-e glass and argon fill. With an upgrade to the Deluxe glass package, consumers can expect the U-factor and SHGC to improve.
HiMark 400 Window: .28 U Factor, .30 SHGC, .05 Air Infiltration
HiMark 500 Window: .25 U Factor, .28 SHGC, .02 Air Infiltration
HiMark 800 Window: .25 U Factor, .24 SHGC, .01 Air Infiltration