10 in. Ductboard Collar with Damper

The Master Flow 10 in. duct-board Starting Collar is suitable for 1 in. to 1-1/2 in. duct-board plenums. It provides a transition from the plenum to round pipe or insulated flexible duct. This starting collar has a built-in damper which allows for adjusting air flow within the duct run. It can be used with duct-board, an internally lined or unlined plenum. This galvanized steel starting collar features extra-long tabs.Used with duct-board thicknesses from 1 in. to 1-1/2 in. (or R-6 value)Connects round pipe or insulated flexible duct to a flat surface to start a duct runBuilt-in damperFits most HVAC types for universal applicationCan be used with an internally lined or unlined plenumExtra-long tabsSeal seams with code-approved mastic, sealant or duct tape (sold separately)