OpenBuildings Energy Simulator is a rigorous yet intuitive application for the design, simulation, and analysis of building energy performance.
Used in both design and retrofit work, the software contributes to better-performing, more sustainable buildings that consume less energy; provide greater occupant productivity, comfort, and safety; and control lifecycle operational energy costs for their owners.
To get started:
How to install OpenBuildings Energy Simulator
Starting OpenBuildings Energy Simulator
Creating a Project - Workspaces and Worksets explained
How to find Learnserver Training
How to access the Help Manuals
Methods of creating building model
Suggested Workflow for new users on how to Model your Building