AutoCAD Duct LISPs for HVAC Design - Rectangular and Round

LISP is a popular customization for AutoCAD. Many people use it to extend AutoCAD capabilities, do things that normal AutoCAD can't.

How to install a LISP in AutoCAD?

For installing a LISP in AutoCAD you can simply drag the LISP with the mouse and drop it in the drawing window. Or through Manage window then Applications and chose the LISP then click Load.

Download Also: Flexible duct Autolisp and also HVAC Shop Drawings for School Project 

AutoCAD Duct LISPs for HVAC Design 

Rectangular and Round Duct AutoCAD Lisps:

Download Rectangular Duct lisp: for drawing a rectangular duct

Download Round Duct / Pipe lisp: for drawing a round duct or water pipe 

Write the lisp abbreviation in the command line in AutoCAD the press enter and follow the steps of each lisp.