COMcheck
PNNL (US Department of Energy)
COMcheck from the US Department of Energy checks whether a commercial or high-rise residential building meets the IECC and ASHRAE 90.1 energy codes. You enter the envelope assemblies, interior and exterior lighting and mechanical systems, and the program works out compliance and produces a report ready for submission. The recommended version runs in the browser and supports current codes (IECC up to 2024, 90.1 up to 2022). Suited to architects, HVAC and electrical engineers and energy consultants. Limitations: it is built on US codes, and the older Windows desktop version no longer receives new codes.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | Free tool from the US Department of Energy, in a browser version and a Windows version, at no cost. |
| Platforms | Windows, Runs in the Browser |
| Engineering field | Architecture, Electrical & Electronics, Mechanical Engineering |
| Tool type | Engineering Calculators |
| Vendor site | www.energycodes.gov |
This link goes to the vendor site. EngiFree hosts no installers and distributes no cracked versions.
Last verified: 2026-10-06
