Nist Refprop 9.1 Download __exclusive__ Jun 2026

To understand what changed from 9.1 to 10, see the New Features of REFPROP 10 , which details optimized code and new refrigerants like R1233zd(E).

; it is not available as a free public download. The full version must be purchased through the NIST Standard Reference Data (SRD) Shop Version 9.1 Status Nist Refprop 9.1 Download

: Version 9.1 is considered a legacy version. Current purchases typically provide Version 10, though existing 9.1 license holders can often obtain a discounted upgrade to Version 10 for approximately $125. Trial Version : NIST offers a mini-REFPROP (Version 10) To understand what changed from 9

In the world of thermodynamics, chemical engineering, and HVAC&R (Heating, Ventilation, Air Conditioning, and Refrigeration), precision is non-negotiable. Whether you are designing a heat pump, simulating a natural gas liquefaction process, or calculating the properties of a new refrigerant blend, you need a source of thermophysical data you can trust. I understand you're looking for , but I

I understand you're looking for , but I should clarify a few important points:

9.1 is less resource-intensive for older workstations.

For years, has served as the industry gold standard for calculating the thermophysical properties of fluids. Even with the release of newer versions like 10.0 and 23.0, version 9.1 remains a highly sought-after tool due to its stability, wide adoption in legacy systems, and comprehensive database.