(Ul)(Li)665 Max Cfm Exterior Blower(/Li)(Li) External Blowers Are Located Remotely Outside Of The Range Hood And Come In Two Versions, Exterior And In-Line: (Ul)(Li)Exterior Version: Located On The Outside Roof Or Wall Of The House.(/Li)(/Ul) Best Exterior Blowers Can Be Roof- Or Wall-Mounted, Depending On Your Appearance Preferences, Or To Best Suite The Ducting Requirements Of The Application. Blower Housings Are Crafted From Durable, Weather Resistant, Brushed Aluminum For Worry-Free Installation. Housings Can Be Painted To Match Your Decor.(/Li)(Li)Duct Size: 10" Round(/Li)(Li)Thermal Overload Protected(/Li)(Li)For Use With Best Hoods And Downdrafts, Including The D49M Cattura Downdraft, Designed To Use External Blowers. (/Li)(/Ul)