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Part Info
D & W INC_ 3840RBK Register for Heating
Description: Rotaire Register Black
Quick Notes: D & W INC. 3840RBK Heating Register Rotaire Register Black
Details: 5 1/2" Grille Face 4" Back BLACK Round Rotaire Grille Damper Heat AC Outlet Register Vent 3840RBK RV Trailer *Unique worm-drive damper (A worm drive is a gear arrangement in which a worm(which is a gear in the form of a screw) meshes with a worm gear (which is similar in appearance to a spur gear). The two elements are also called the worm screw and wormwheel. *Center knob opens and closes the vent wings. In fully open position the vent wings are completely retracted allowing 100% unrestricted air flow. *360 rotation *Easy installation and long term durability. *Accepts 4" flex duct.
Quick Notes: D & W INC. 3840RBK Heating Register Rotaire Register Black
Details: 5 1/2" Grille Face 4" Back BLACK Round Rotaire Grille Damper Heat AC Outlet Register Vent 3840RBK RV Trailer *Unique worm-drive damper (A worm drive is a gear arrangement in which a worm(which is a gear in the form of a screw) meshes with a worm gear (which is similar in appearance to a spur gear). The two elements are also called the worm screw and wormwheel. *Center knob opens and closes the vent wings. In fully open position the vent wings are completely retracted allowing 100% unrestricted air flow. *360 rotation *Easy installation and long term durability. *Accepts 4" flex duct.
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