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Energy efficiency options, surprising to most, aren’t necessarily the biggest price indicator in the industry for window prices. With coatings, gases and multiple panes, the window prices will depend on the combination that you select.
These gases consist of Argon and Krypton. Krypton is a denser gas and slightly more expensive. The virtually invisible film on a window is known as Low-E. It reduces non-solar heat loss or gain, depending on the season.
Expect to pay roughly 10-15% more for gas and Low-E from the baseline window price.
Triple Pane is the most efficient window on the market, but it comes at a slightly higher cost than dual pane. The cost difference between dual and triple pane is about 20-25%, but frequent promotions are available.
The price information given in this series is ball park, and as you know, window prices will vary.