The Broan RMPE7004 Stainless Steel Power Pack for External Blower is designed to fit flush with the bottom of a cabinet or custom 30-48 inch wide hood. The 1500 CFM centrifugal blower is combined with a multispeed control to provide quiet and effective performance. The interior or exterior blowers are combined with multi-speed control with Heat Sentry to provide quiet and effective performance. Halogen lighting complements the beauty of a fully enclosed bottom containing dishwasher-safe filters. Optional non-ducted filters for indoor exhaust recirculation are available. Some ductwork required.