WARNING This unit is not designed for use with a charcoal grill. ! Either an interior or exterior blower or in-line blower may be used with this hood. The Best by Broan WPD29M Series must be installed with blower models P12D, ILB11, EB12 or EB15 only. Other blowers cannot be substituted. (Blowers sold separately.) Plan where and how the ductwork will be installed. If installing ILB11 in-line blower, discard its rough-in plate. Refer to instructions packed with in-line blower and follow steps 1 u