: It lacks the full catalog of industrial refrigerants and does not include technical support from NIST.
Fees fund the continued updates of fluid property libraries. How to Get RefProp (The Right Way)
In the world of thermodynamics, (REference Fluid PROPerties) is the gold standard for calculating the behavior of industrial fluids and refrigerants. Because it is such a critical tool, many users go looking for a free version of REFPROP 9.1 , but the reality is that the full software has always been a paid product distributed by the National Institute of Standards and Technology (NIST) .
Students learning the basics of thermodynamic modeling. Free Open-Source Alternatives to REFPROP