Right-Suite Universal - HVAC
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
HVAC-Calc - HVAC-Calc: The Heat Gain Heat Loss Calculator 1-888-736-1101, only $49 for do-it-yourself
AutoCAD Plant 3D - AutoCAD Plant 3D is a BIM software that lets you create, modify, and manage schematic piping and instrumentation diagrams.
Ascente - HVAC
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting