The Broan RMP17004 Elite Custom Power Pack is designed to fit flush with the bottom of a cabinet or custom hood that's 30 to 48 inches wide. The 400 CFM centrifugal blower is combined with a multi-speed control to provide quiet and effective performance. The Heat Sentry automatically turns the blower to high speed when excess cooking heat is detected. The dishwasher-safe aluminum filter features a quick-release latch and professional style appearance. With brilliant dual halogen lighting this is the perfect option for an exceptional custom-mounted look.