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The Pellas with internal blinds are not gas charged and sealed for a higher insulation value. For what that is worth, I like them otherwise.
We replaced everything in our house with Anderson vinyl clad wood interior double pane with argon (I think) gas sealing between the panes. Cut our energy bills by at least 1/3. My father in law is a lifelong contractor and prefers Anderson due to their quality and fantastic support. He put them in their very nice custom built home, that was good enough for me.
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‘07 Mazda RX8
Past: 911T, 911SC, Carrera, 951s, 955, 996s, 987s, 986s, 997s, BMW 5x, C36, C63, XJR, S8, Maserati Coupe, GT500, etc
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