Return and Exhaust air duct branch take off section details are given in this AutoCAD DWG file. In this file, the section details of the duct are mentioned. Two types of branches are given in this drawing. They are branch up to 500 mm that is 20" and 525 mm that is 21". Thanks for downloading the AutoCAD files from the cadbull website. Download the 2D AutoCAD DWG file now.
