This 36" Gas Cooktop Includes Downdraft, An Integrated Ventilation System That Doesn'T Require A Separate Hood. The Cooktop Features A 17K Btu Professional Burner To Achieve Both High Heat Needed For Searing And Low Simmer Settings. The 5K Btu Even-Heat Simmer Burner Enables Precise Simmering And Melting While The 300 Cfm Exhaust Rating Means The Venting Can Handle It All.