Broan Evolution QP4 Series QP430SS 30" High Performance Under-Cabinet Range Hood 4 Halogen with Theater-Style Transitions Easy-to-clean Advanced Heat Sentry: Stainless Evolution 4 (QP4) series 4-way convertible under cabinet range hood Adjustable duct connector accommodates off-center duct work 4-level centrifugal blower provides increased performance and quieter operation (normal, mid, high, boost) Quiet 0.3 sones at normal speed (150 CFM), 4.5 sones at high speed (470 CFM) and 7.5 sones at boost (630 CFM)