High Performing Windows or Storm Windows
- Publisher
- ENERGY STAR, U.S. Environmental Protection Agency
- Dates
- Source dated 2026-08-24; retrieved 2026-08-24
- Supports
- Live product-performance and buying-scope context, including climate zones, labels, U-factor, solar heat gain coefficient, and installation checks.
- Not price evidence
- Does not support the calculator multipliers, installed-cost assumption, labor share, installer price, or modeled range.