John,
We typically use eQuest, as it is probably the most universal and accepted software in the US. However, there's quite a learning curve, and you have to do some research on materials to understand the choices. It may be more than you are looking for.
http://doe2.com/equest/index.html
The next runners-up used to be Green Building Studio's web-based tools, and Ecotect. Alas, both have been purchased by Autodesk and made generally incompatible with anything else . However, if you're willing to do some translation through AutoCAD or Revit, Ecotect is simple and has gorgeous results.
http://ecotect.com/
http://www.graphisoft.com/support/archicad/
And, of course, there's what Graphisoft says:
http://www.graphisoft.com/products/archicad/solutions/analysis.html
You may also want to check out classes or seminars in energy modeling; we have a doctoral student at our firm that helps us out. There's a lot of new technology and nomenclature involved.
Good luck!
Chuck
Chuck Kottka
Orcutt Winslow
Phoenix, Arizona, USA
ArchiCAD 25 (since 4.5)
Macbook Pro 15" Touchbar OSX 10.15 Core i7 2.9GHz/16GB RAM/Radeon Pro560 4GB