Today drawing a 3D ducting layout over a PDF floor plan. Using a affordable program called Mech-Q.
First inputing Tees, Elbows, Branches, Diffusers and finally Flex Ducting.
More at cadavenue.com/ducting-module.htm
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Part 1 of this series: https://youtu.be/Obh8alTylX0
For more about DIMSCALE see: https://youtu.be/n5NBgQ6O1eI
53 “Autocad” commands – crash course in CAD