Description
A typical motorized damper detail for HVAC ductwork, drawn in plan and elevation, showing how a motor-operated (control) damper is mounted in a duct and tagged. The damper blade runs on a shaft through the duct wall to an external actuator, with the MD tag shown, so the branch can be opened, closed or modulated automatically by the building controls – the standard way to shut down or balance an air path.
It is a reusable mechanical-services standard you drop onto a duct layout, with the note to allow sufficient service clearance to the actuator as per the manufacturer’s data sheet.
See also the duct connection detail and the ductwork construction schedule in the building services details category. A free AutoCAD DWG download.
