Fantech bathroom exhaust fans are designed to operate quietly and effectively, so people actually use them. Yet their affordability means they're right for every bathroom from simple to luxurious. The only additional elements required to complete the installation are flexible ductwork and a roof or side vent. All FR Series fan kits feature fan, mounting bracket and grill/collar/backdraft damper combination, and all kits are prewired for easy connection to your electrical source. This kit is for dual point exhaust and uses 6" duct rom the fan to the Y adaptor (included), and then 4" duct to the grill housing.