Are Andersen windows energy star?

Yes, the vast majority of window product lines manufactured by Andersen Windows can be custom-configured to fully meet or exceed the strict energy efficiency guidelines set by the Energy Star program. Whether you choose their budget-friendly 100 Series Fibrex composite windows, their classic wood-core 400 Series, or their high-end architectural A-Series and E-Series lines, the level of energy efficiency is largely determined by the glass package you select. By pairing these structurally sound frames with advanced glass technologies—such as Andersen’s High-Performance Low-E4 glass, SmartSun glass, or triple-pane glass options featuring insulating argon gas fills—the windows achieve exceptionally low U-factors and optimized Solar Heat Gain Coefficients, allowing them to earn Energy Star certification across all regional climate zones.