Refprop 91 Free [exclusive] Jun 2026

Contains a limited selection of fluids (like water, CO2, nitrogen, and R134a).

Many download aggregate portals market "Free Trials" or "Crack Files" of REFPROP.EXE . These external files are frequently bundled with dangerous malware, spyware, or ransomware that can compromise corporate and personal networks.

It is open-source (forever free), cross-platform, and supports Python, C++, MATLAB, Excel, and more. refprop 91 free

Covers a comprehensive list of refrigerants (R134a, R410a, etc.), hydrocarbons, and atmospheric gases.

The web is full of third-party sites offering "REFPROP 9.1 free download." This is an extremely dangerous practice. Files from these sources cannot be verified and are often repackaged with malware, spyware, or viruses. Furthermore, downloading and using a cracked version is a violation of NIST's copyright and license agreement, which could expose you or your organization to legal liability. Contains a limited selection of fluids (like water,

If you require REFPROP for professional or academic accuracy, you should obtain it through official channels: New License (Version 10): Available for $325.00 from the NIST Standard Reference Data Store

If you want to move forward with setting up your thermodynamic models, tell me: What or mixtures are you analyzing? Files from these sources cannot be verified and

For many years, the architecture and property models established in version 9.1 served as the foundation for later iterations. It's the deep well of accurate data, covering properties like density, enthalpy, entropy, and thermal conductivity across a wide range of temperatures and pressures, that makes this software so indispensable.

The only official, free version of the program is . This is a free sample version distributed by NIST, designed specifically as a teaching tool for introducing thermodynamics to students. The mini-REFPROP program includes a limited number of pure fluids and a few pseudo-pure fluids for basic mixture calculations.