THERM
Lawrence Berkeley National Laboratory
Download from the vendor
windows.lbl.gov
A tool for two-dimensional heat transfer analysis in envelope components: a window profile, a wall-to-window junction, a thermal bridge at a corner or a beam. Draw the section, define materials and boundary conditions, and get isotherms, heat flux and a U-value. That is exactly the calculation that identifies thermal bridges and condensation risk before they show up in the building.
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 | Simulation & FEA |
| Vendor site | windows.lbl.gov |
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Last verified: 2026-09-02
