Downloading AutoCAD Plant 3D 2015 for free is primarily possible through official Autodesk channels if you are a student or educator. Autodesk has moved to a subscription-based model and generally does not provide public "free" downloads for legacy versions like 2015 to the general public. How to Access the Software Legally Educational License
End of Support: Starting March 10, 2025, Autodesk discontinued support and activation services for the 2015 and 2016 versions. Descarga gratuita de AutoCAD Plant 3D 2015
for the latest version of Plant 3D compared to the 2015 version? AutoCAD Plant 3D Updates - Autodesk product documentation Downloading AutoCAD Plant 3D 2015 for free is
A. For Students/Hobbyists (Free Option)