Step #1
Make sure the version of Revit you are editing is shut down. Open an instance of windows explorer & go to the following file path:
“%AppData%/Autodesk/Revit/Autodesk Revit (Revit Version)”
& find the Revit.ini file.
Step #2
Open this file using notepad or another text editor and under the “[Misc]” Section Add the following:
EnableHeatingAndCoolingLoads=1
EnableWeatherInLocation=1
Step #3
Save over the existing Revit.ini & you should now see the “Heating & Cooling Loads” button in the Analyze Tab.
