Designed to help you move your range blower to exterior walls or the roof, minimizing sound levels while providing exceptional performance Weather-resistant aluminum housing can be painted to blend better Thermal overload-protected unit provides peace of mind Requires electrical connections to both the hood and the exterior blower Designed for use with models UP26, UP27, WP28, WP29, WPD39M, all EX & E models, KEX, IEX, K210A, K260A, PIK, DDEX, and with all Best hoods and downdrafts that support external blowers, including the D49M Cattura downdraft