Design Master HVAC
Create and adjust HVAC building designs and drafts in the integrated environment. It runs on top of the main AutoCAD functionality and supports single-line and double-line 2D ductwork with automatic fittings and 3D ductwork. Automatically or manually calculate duct sizes.
The 4.5.8 version of Design Master HVAC is available as a free download on our website. Our antivirus check shows that this download is malware free. The software is included in Photo & Graphics Tools. This software is a product of Design Master Software, Inc.
From the developer:
Design Master HVAC is an integrated HVAC building design and drafting program that runs on top of AutoCAD.
You may want to check out more software, such as Design Master Electrical RT, Kit-Design Master Release or Design Master Electrical, which might be similar to Design Master HVAC.