Ingeniously designed Flex-Z Fast™ installation bracket with articulating joints provides flexible, fast and EZ installation for all your renovation/remodeling projects. The detachable installation adapter provides even greater flexibility, as it simply slides off the fan housing for EZ wiring and attachment of the duct from under the ceiling. You won't have to replace ductwork or buy extra conversion kits because WhisperFit® EZ comes with a detachable 4" to 3" adapter that gives you greater flexibility, in duct layout and design, especially in older properties. No rewiring is needed because this ceiling mount fan can simply utilize existing switches. Panasonic fans are also UL listed for tub/shower enclosure when GFCI protected. With these great features, your installation options open up.