A branch duct takeoff connects to a main exhaust or return duct. A volume damper is installed within the branch duct to regulate airflow. The branch duct features a minimum width dimension requirement of four inches or one-quarter of the duct width W.
EXHAUST AND/OR RETURN BRANCH DUCT MAIN EXHAUST OR RETURN DUCT VOLUME DAMPER BRANCH DUCT RETURN / EXHAUST DUCT TAKEOFFS 4" MIN 1/4 W W
Members view this detail in full resolution, download the CAD files (SVG, PDF), and can adapt it in the built-in CAD editor — export DXF, DWG, or PDF.
Start membership