Book excerpt: Autodesk® Revit® 2019: Review for Professional Certification - Mechanical Building Systems is a comprehensive review guide to assist in preparing for the Autodesk Revit for Mechanical Building Systems exam. It enables experienced users to review learning content from ASCENT that is related to the exam objectives. The content and exercises have been added to this training guide in the same order that the objectives are listed for the Autodesk Revit for Mechanical Building Systems exam. This order does not necessarily match the workflow that should be used in the Autodesk® Revit® 2019 MEP software. New users of Autodesk Revit MEP 2019 software should refer to the following ASCENT learning guides: Autodesk® Revit® 2019: MEP FundamentalsAutodesk® Revit® 2019: BIM Management: Template and Family CreationAutodesk® Revit® 2019: Collaboration Tools Prerequisites:Access to the 2019 version of the software. The practices and files included with this guide might not be compatible with prior versions.This guide is intended for experienced users of the Autodesk Revit software. Autodesk recommends 400 hours of hands-on software experience prior to taking the Autodesk Revit Review for Professional Certification - Mechanical Building System exam.