An addition to or replacement D&W/Valterra heating or cooling round register vent w/o damper. The two-piece, snap-together design covers all screw heads and offers a clean updated look.
Designed For Accepting All Types Of 4 Inch Flex Duct
Increased efficiency in all heating and air conditioning applications.
360 Degree Rotation
Rotates to direct air flow.
Easy Installation And Long Term Durability
Plastic two piece snap together design shows no screw holes.
(1) 2 Piece Snap Together Register Vent
See Diagram Above for Dimensions
Fits Into Approx. 4" Cut-Out
Overall: 5-3/8" Dia
The Rotaire line offers the ideal properties for increased efficiency in all heating and air conditioning applications: 360 rotation, easy installation and long term durability. The Rotaire Grille has an over-all diameter of 5-3/8" and is designed for accepting all types of 4" Flex Duct.
The #3940 Rotaire Vent is the new contemporary redesign of the classic #3840 Rotaire. The base section and screw-hole placement is identical to the #3840 and no alterations are necessary to exchange the two parts.