Hello,
I tried to create a plugin to export the 3D model to Energy3D format in order to conduct an energy study. It's quite complicated because you have to recreate all the walls, and Energy3D blocks roofs, etc. But in the end, I have something that works.

Video demo : https://tube-sciences-technologies.apps.education.fr/w/3SC3pGN1qXEUbdgqZ89D2V

Plugin : https://github.com/technologiescollege/SweetEnergy3d

Energy3D : https://github.com/technologiescollege/energy3d

Hope this will be useful.