IGU Replacements for True Divided Lite Bow Window???

This true divided lite 2x-paned window (pic attached) is on the east side of a home in climate zone 5a.  Today, while stripping to re-putty, the contractor pointed out foggy-ish… This true divided lite 2x-paned window (pic attached) is on the east side of a home in climate zone 5a.  Today, while stripping to re-putty, the contractor pointed out foggy-ish…Read MoreGreenBuildingAdvisor