featured Energy Code Compliance: How Aluminum Windows Meet IECC 2021 Requirements
What IECC 2021 Actually Requires for Windows — and How Aluminum Systems Deliver Energy code compliance is no longer a checkbox exercise. As more states adopt or enforce the 2021 International Energy Conservation Code (IECC), architects, contractors, and builders face stricter fenestration performance thresholds than any previous edition. For those specifying aluminum windows, the question is direct: can aluminum meet the code?...
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Aluminum Window U-Factor Targets by Climate: A Designer's Reference
Why U-Factor Is the Most Critical Metric for Aluminum Window Specification When architects, builders, and contractors specify windows for a new construction or retrofit project, no single performance number carries more regulatory and energy consequence than U-factor. Unlike visible light transmittance or air leakage ratings, U-factor directly determines whether your fenestration assembly passes prescriptive energy code—or triggers a costly performance-path compliance review....
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