Frigidaire PL30DD50EC Professional Series 30-Inch Downdraft Ventilator, Stainless Steel 30" rear-mounted downdraft vent; 500 cfm external exhaust ventilation system Mounts behind cooktop Dishwasher safe aluminum filters Push button auto raise / lower; infinite speed blower control 30-inch width by 29.5-inch depth by 7-inch height