Shop now for a bargain on the 20" x 4" Double Deflection Adjustable Grille, Front Blades Parallel to Short Dimension with an Opposed Blade Damper in soft white (Shoemaker 904-0-20X4) at PlumbersStock.com, where you'll find we are industry leaders. The 904-O series airfoil aluminum blades are adjustable for your comfort and convenience. It provides 4-way airflow on one plane. It runs quietly because of nylon bushings that prevent metal from rattling. The front blades are parallel to the shortest dimension, and the back blades are parallel to the longest dimension. This grille does come equipped with an opposed blade damper. Shoemaker replacement parts can be hard to find, so contact us if you have any problems.
The Shoemaker 904-0 Series vent cover comes with a recessed screwdriver-operated opposed blade damper. It is used to regulate the airflow through linked sections of adjacent blades that rotate in the opposite direction. Compared to other damper types, an opposed blade damper maintains a more even airflow. It also provides better control over the airflow in all operating positions. It has an extruded aluminum surface mount frame with signature line marks.
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