The Master Flow 7 in. Starting Collar with Damper is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal, duct board or insulated) to round pipe or insulated flexible duct. The installed damper helps to control airflow in the run of pipe. This galvanized steel starting collar can be used with duct board, an internally lined or unlined plenum. It features extra-long tabs to fit most duct board thicknesses.
Connects round pipe or insulated flexible duct to a flat surface to start a duct run
Fits most HVAC types for universal application
Extra-long tabs to fit most duct board thicknesses through 1-1/2 in. (or R-6 value)
Seal seams with code-approved mastic, sealant or duct tape (sold separately)
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.