Chimney Island Hood includes duct cover for up to 9' ceiling, 3 speed control, filter timer tells when to clean filter, delay function,halogen lighting with 3 settings, SS and aluminum mesh filters,heat sentry,vertical transition with backdraft Incl.Must include blower motor and Mounting Plate 814781 for all Internal blowers 300 CFM 814419,450 CFM 814420, 600 CFM 814421,900 CFM 814422, External 600 CFM 801640,900 CFM 801641,1200 CFM 801642,1500 CFM 804701,