Unlocking the Power of RefProp 9.1: A Comprehensive Guide to the Free Version

The search for REFPROP 9.1—NIST’s industry-standard Reference Fluid Thermodynamic and Transport Properties database—is common among engineering students, researchers, and HVAC professionals. However, because this is a proprietary software developed by the National Institute of Standards and Technology (NIST), finding a "free" version comes with significant caveats.

The REFPROP 9.1 free version offers several key features:

The online meeting took place a few days later. Thermo_guru shared a link to a private webpage, which contained a brief application form and a detailed description of the program. The program, thermo_guru explained, was designed to support research and development in the field of thermodynamics.