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- Windows on Washington
- Posts: 4661
- Joined: Fri Oct 27, 2006 11:23 am
- Location: DC Metropolitan Area-Maryland/Virginia/DC
Depending on the climate though, you may be blocking too many of the free warming rays of the winter. There is a reason that we specify Low-e most often according to climate and elevation (i.e. North - South - East - West). Standard low-e will negate solar heat gain, as compared to standard dual pane float glass, by more than 200%. That is standard Low-e.