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Why Do Manufacturers Put Argon Gas Between Window Panes?

By Gates Dearen
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If you’re looking to increase the energy-efficiency of your home, removing those old drafty windows and replacing them with modern double-paned windows is a great idea.  To make your new windows even more efficient, some replacement windows are manufactured with argon gas sealed between the panes.  What many consumers want to know is; why do window companies inject argon gas between the panes, and is it worth the money?