AC Infinity Backdraft Damper Ducting Insert, Black Galvanized Steel, 8" Cleaners & Disinfectants It is designed to be

It is designed to be very energy efficient

Heavy-duty shell and internal muffler dampen noise to allow for continuous ultra-quiet operation

Ona Pro Gel is close to odorless

Width (in):  9

AC Infinity Backdraft Damper Ducting Insert, Black Galvanized Steel, 8" Cleaners & Disinfectants It is designed to beAC INFINITY BACKDRAFT DAMPER DUCTING INSERT An anti draft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounts horizontally or vertically to prevent back flow and debris from entering ducting. Galvanized steel body with spring loaded aluminum damper blades that open with minimal airflow. Fit for 8 in. Duct