FeaturesWhite enamel steel grille8 in round duct connectorsLow profile, white painted enamel steel grilleSingle, impact resistant centrifugal blower wheelCan be ducted horizontally or vertically20 ga galvanized steel housingIn-line ducting available with separate adapterUse Broan® electronic variable speed control to adjust blower speed and sound level3 Sones sound level316 cfm at 1/8 in, 312 cfm at 1/4 in flow rate317 cfm at 0.1 in