Run a Systems Analysis

Use the Systems Analysis tool to create a load calculation or annual simulation report for heating, cooling, and airflow.

After analytical spaces are assigned, you can run a systems analysis. Revit uses a workflow to run the analysis. A workflow is a script that takes data from Revit, translates it to EnergyPlus, runs a simulation, and creates a report for design heating, cooling, and airflow. You can create your own customized workflow scripts. See the Autodesk University class, "Revit Systems Analysis Features and Framework-Creating Custom Workflows."

Note: If analytical systems are not created, Revit uses an ideal air system for the systems analysis. If analytical systems are created, but some analytical spaces are not assigned to the zone equipment, those analytical spaces will use the ideal air system.

Two workflows are available by default: one for HVAC simulation and one for annual simulation. If the workflows do not appear in the dialog, you can set the folder location in the Options Dialog: File Locations Tab.

To run the systems analysis

1. Click Analyze tabEnergy Optimization panel Systems Analysis .
2. Select an analysis workflow. The following two options are available by default.
   • Annual Building Energy Simulation
   • HVAC System Loads and Sizing
3. Enter a report name.
4. If desired, click Settings to change the default folder for where reports are saved.
5. Click Run Analysis.

   The analysis runs in a background process so you can continue working. When the analysis is finished, you will be notified by the Background Processes on the Status Bar with a link to view the report.

   Each workflow generates two report styles: a loads report and a detailed report.

   Sizing loads are automatically added as properties to the analytical spaces at the end of the analysis.