If you are a student or educator, you can typically access the latest Autodesk professional suites for through the Autodesk Education Community using currently supported tools like Revit Insight
For legacy users with existing perpetual licenses, activation typically required: Serial Number:
While Autodesk Ecotect Analysis 2011 was a pioneer in the green building movement, seeking out "Xforce keys" is a dangerous path for your computer’s health and your professional reputation. Transitioning to integrated tools like or FormIt will provide more accurate results and a much more secure workflow.