Replacing Your Windows: Get Smart for Best Choices
Glass Tech Windows are mostly glass, so glass most affects energy loss. Glass technology has really advanced. Energy loss through glass now gets slammed by low-conductivity spacers, low emissivity ("Low-E") coatings, and gas-filling. With all, you lower energy costs to save money.
Spacers Spacers separate the panes. If the spacers are "warm edge", they further lower heat loss and condensation - other spacers don't do that so well.
Coatings Although glass Low-E coating is mostly see-thru, it is metallic, so it keeps heat in during winter and out during summer. Types that cost more also save more energy (money). But any Low-E type is far better than uncoated (clear) glass.
Gases Inert gases like argon and krypton go between the panes. Like insulators-and far better than just air-the gases lower heat flow between the panes.
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Although glass Low-E coating is mostly see-thru, it is metallic, so it keeps heat in during winter and out during summer. Types that cost more also save more energy (money). But any Low-E type is far better than uncoated (clear) glass.
