WINDOW
Lawrence Berkeley National Laboratory
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windows.lbl.gov
A tool for computing the thermal and optical properties of glazing systems: U-value, solar heat gain coefficient and visible light transmittance, based on the layer build-up, coatings, gas fill and frame. It works with an international database of commercial glass products and serves as the data source for whole-building energy simulation.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | Software from a US national laboratory or government agency, distributed free. Free registration may be required to download. The underlying data and standards are American — adapt to local conditions. |
| Platforms | Windows |
| Engineering field | Architecture, Mechanical Engineering |
| Tool type | Engineering Calculators |
| Vendor site | windows.lbl.gov |
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Last verified: 2026-09-02
