Opposed Blade Dampers (Non-Directional)


Opposed blade dampers allow for airflow to be adjusted without changing direction. They fit snug into duct openings and blade manipulation is accomplished with a screwdriver. OBD’s are sold in whichever color we have in stock, either silver or black.

Dimensions: Overall length and width will be 1/2″ less than the listed duct opening size. Depth/thickness is 1-7/8″ for all sizes. For example, a damper for a 10″ x 6″ duct will be 9.5″ x 5.5″ x 1.875″.

Opposed blade dampers are non-directional, as opposed to our directional louvers which can be adjusted to direct air in one of two directions.