Frigidaire PL36DD50EC Professional Series 36-Inch Downdraft Ventilation System, Stainless Steel Rear-mounted downdraft vent; 3 position discharge; 500 cfm external exhaust ventilation system Mounts behind cooktop; top trim kits available in black and white Dishwasher safe aluminum filters Push button auto raise / lower; infinite speed blower control 36-inch width by 7-inch depth by 29.5-inch height