The Slim-Line Style Of The Broan 153001 30 In. Silhouette Slide Out Range Hood In Brushed Aluminum Merges Perfectly Into The Design Of Today'S Contemporary Kitchen. The Unseen Advantages Include The Quiet, Powerful Performance Of The 300 Cfm Dual Centrifugal Blower System. The Blower And Light Automatically Turn On When You Slide Out The Clear Glass Visor And Shut Off When Pushed In. When Activated The Unit Will Automatically Remember The Last Fan Setting You Selected.