Injection formed frame with smooth aluminum louvers that automatically open when fan turns on, and close when fan turns off to stay out air, insects, and dust. Interior Use.
Balanced shutters for complete automatic service-free operation
Installs centered on joist with 18" or 24" centers with 2 cut openings, 1 on each side of center joist per shutter model.
Fits Fan # WHFS24M - 24"
Opening Size Required: 27.25" x 28.25"
White Enamel Finish - Interior use.