This 30-Inch Retractable Downdraft Vent Rises 14 Inches To Help Filter Steam From Tall Stockpots, And Remains Flush With The Cooking Surface When Not In Use. The 600 Cfm Pro Motor Has The Power To Provide Effective Venting For Most Cooktops. The Vent System Is Reversible To Help Fit In The Cabinet Space Under The Vent.