• 514 CFM 3.3 Sones. (AMCA) • 120 VAC, 2.2 AMPS. • 4-1/2" x 18-1/2" duct • Painted white enamel steel grille • Two impact resistant centrifugal blower wheels • Can be ducted horizontally, vertically or in-line • cUL & UL Listed. Incredibly reliable. Unbelievably quiet. Offering the CFM choices you need at the lowest sound levels in the industry. Commercial ventilators perfect for conference rooms, bathrooms, commercial kitchens or any other area that requires quiet, continuous ventilation. With a low profile grille that blends seamlessly with the ceiling. Models available with white polymer or painted white enamel steel grille. Use Broan Electronic Variable Speed Control to adjust blower speed and sound level (available separately).