Cirrus Pronunciation: "Sear-Rus" Features Today'S Open-Living Concepts Integrate Rooms, And Allow Uninterrupted Sight-Lines Within The Living Space And On To The World Outside. Cirrus Won'T Get In The Way. It Is Discrete, Virtually Out Of Sight, Masquerading As A High Tech Lighting System. Cirrus Lives Above, Gently Touching The Ceiling As Clouds Touch The Sky. (Ul)(Li)Stainless Panels Lie Flat To Ceiling For Minimal Intrusion; 110 Cm (43-3/8 Inch) Width(/Li)(Li)Uses External Blowers For The Ultimate In Performance Choices And Quiet Operation. Select From Either In-Line Or Remote Exterior Blower Options Up To 1650 Cfm(/Li)(Li)Acr3 Handheld Remote Control Included To Make Operation Convenient And Easy(/Li)(Li)4-Speed Electronic Touch Controls(/Li)(Li)Six Leds Provide Bright, Energy Efficient Three-Level Lighting (Bulbs Included). This Model Uses A Warmer Led With A Color Temperature Of 3000-3500K(/Li)(Li)Delay Off Feature Allows You To Continue Ventilation For Up To 10 Minutes; Filter Timer Ensures You Are Notified When It'S Time To Change Charcoal Filters(/Li)(Li)Unique Blower Housing Can Be Rotated For Duct Access From Any Direction; Vertical Duct Attachment Uses 8" Round Duct(/Li)(Li)Designed To Be Most Effective At 7' To 9' Ceilings(/Li)(/Ul)