Features Best Internal Blowers Provide Exceptional Performance And Sound Levels That Are Both Quiet And Gratifying. (Ul)(Li)1300 Max Cfm @ 12 Sones (High)(/Li)(Li)Duct Size: 10" Round(/Li)(Li)Blower Can Be Used In Vertical Or Horizontal Orientation, Depending On The Range Hood Selected. (Internal Blowers Are Located Inside The Range Hood.)(/Li)(Li)For Use With Ip29M, Wp28M, Wp29M, Wp39M,P195P(/Li)(Li)Thermal Overload Protected(/Li)(/Ul)