This seminar discusses extracting ASHRAE HQ building information from the BIM (in Revit) using Green Building XML (gbXML). Then, it explains how to take the gbXML file and import it into TRACE to perform HVAC load calculations. Ideally, this should be a seamless process where all information transfers perfectly from one vendor's software tool to another and creates an HVAC load calculation at the click of a button. However, in reality, this does not happen. The speaker discusses the difficulties encountered and what practitioners should do to make it as seamless as possible.