In Revit Architecture, you can perform energy analysis on conceptual models quickly and easily, before any detailed design work begins. Create a mass model, define analysis settings, and submit an analysis request over the internet. When an alert appears, the analysis is complete and ready for viewing. You can also display multiple analyses for side-by-side comparisons. Use the analyses to make decisions that move your project towards sustainable design.
Overview video (YouTube)
More videos about conceptual energy analysis (autodesk.com)