The SAM_Mollier toolkit, an innovative open-source project for creating and analyzing Mollier/Psychrometric processes, marks a significant leap in HVAC and thermodynamics fields. It utilizes a computational methods to determine essential thermodynamic properties crucial in HVAC system design and analysis. Integrated with the Grasshopper user interface, SAM_Mollier enhances user interaction and accessibility, proving invaluable for both industry professionals and academic educators. The toolkit's workflow allows for the generation of Mollier points through diverse parameters like temperature, relative humidity, or humidity ratio etc. Once established, these points facilitate the querying and calculation of a wide array of variables in HVAC and thermodynamics, providing rapid access to crucial parameters. SAM_Mollier supports a variety of processes including Adiabatic Humidification, Heating, Heat Recovery, Isotermic Humidification, Mixing, Steam Humidification, Room, and Undefined Processes. For each process, the toolkit calculates sensible, latent, and total loads, including changes in enthalpy (Δh), humidity ratio (Δx), temperature (Δt), and Epsilon, representing process direction on chart (the enthalpy to humidity ratio proportion). Uniquely, SAM_Mollier allow to draw Mollier Processes and Points in the Rhino environment on Mollier or Psychrometric Charts, contextualizing values visually. It also features a user-friendly UI for chart printing and data storage, enabling the saving of processes and points along with UI attributes like colors and tags in a JSON format for standardized data storage and sharing.