Slot'S Louvers Can Be Easily Pushed Open To Allow The 300 Max Cfm To 650 Max Cfm Flex Blower To Pull Smoke And Odors Away From Induction And Electric. A Smooth And Sleek Capacitive Touch Control Creates An Integrated Look And Features 10-Minute Delay-Off Functionality And Filter Maintenance Reminders. Grease Trays Are Removable For Easy Clean-Up, And Remote Operation Is Possible Using Optional Acr3 Remote Control. Slot Is Amazingly Convenient - There When You Need It, And Hardly Noticeable When Not In Operation. Slot Provides Hidden, Discrete Built-In Kitchen Ventilation That Resides Flush, Next To The Cooktop Smooth And Sleek 3-Speed Capacitive Touch Control. Operates With Optional Acr3 Remote Control 10-Minute Delay-Off And Filter Clean Reminder Ensure A Clean, Fresh Kitchen Features Removable Filters And Grease Tray For Fast And Easy Cleaning Compatible With Optional Universal Make-Up Air Dampers Requires 3-1/4" To 8" Round Transition - Model 459 (Not Provided)