How to quickly draw duct reducers for HVAC duct systems in AutoCAD?
If you're an HVAC designer or drafter who uses AutoCAD to create duct systems, you may be searching for a way to quickly and easily draw duct reducers. Duct reducers are fittings that connect ducts of different sizes and shapes. They're crucial to maintaining proper airflow and pressure in the duct system. However, manually drawing duct reducers can be tedious and error-prone. You must calculate the dimensions, angles, and offsets of the reducers and then draw them using polylines, arcs, and circles. This can be time-consuming and laborious, especially if you need to draw many reducers in your project.
If you are struggling with drawing duct reducers, there is a simple solution - using an AutoCAD LISP routine. This routine allows you to draw reducers of any size and shape automatically. In the following blog post, I will guide you through the process of using a LISP routine to create duct reducers with ease.
What is the AutoCAD LISP and how do you upload it to AutoCAD?
Once the LISP file has been uploaded, it will activate automatically.
Enter the first width W1.
Enter the second width W2.
Finally, enter the insertion point.
You can download the lisp from here.
Conclusion:
With the LISP routine, creating duct reducers in AutoCAD becomes faster and easier compared to using standard commands. Additionally, you can manipulate the properties of the duct reducers including type, offset, and layer.
I hope this LISP routine proves helpful for your AutoCAD projects. Please leave any feedback or questions in the comments or contact me directly. Thank you for reading and happy drawing!
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