This program is to draw Taper / Branch from the main HVAC Duct to Diffusers or Grills or any other similar situation and the program is very simple and very easy to work with and its FREE to use permanently.
Download from : THIS LINK

This program is to draw Taper / Branch from the main HVAC Duct to Diffusers or Grills or any other similar situation and the program is very simple and very easy to work with and its FREE to use permanently.
Download from : THIS LINK