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Here is a comprehensive guide to understanding what REFPROP 9.1 is, why it is rarely available for free, and the legitimate ways you can access its data without breaking the bank. What is REFPROP 9.1?

: Websites offering "free" full versions of REFPROP 9.1 are often distributing unauthorized copies or malware . 🛠️ Legitimately Free Alternatives

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No. NIST REFPROP has never been freeware. A single-user license for REFPROP 9.1 was ~$325 (later versions are $375+). However:

RefProp (REFPROP) is a property-reference program from NIST for calculating thermophysical and transport properties of pure fluids and mixtures (gases and liquids) using advanced equations of state and mixture models. REFPROP 9.1 refers to a specific past release of that software. refprop 91 free

: It includes an Excel Add-In (XLA) that allows users to call property functions directly from spreadsheet cells.

While many online sources claim to offer crack files or free downloads, these links are often riddled with malware or constitute copyright infringement. Here is a comprehensive guide to understanding what

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No. REFPROP is commercial software distributed by NIST. It requires a purchased license to use legally. refprop 91 free