Broan RP130SS Pro-Style Under-Cabinet Range Hood, 30-Inch, Stainless Steel The deep 9-Inch height provides excellent capture of cooking grease and odor Two-speed Rocker switch control lets you select the proper speed for what you are cooking Micromesh grease filters are dishwasher-safe. Duct Connector Size 3-1/4" x 10" Heat Sentry is a smart feature that detects excessive heat and adjusts speed to high automatically to prolong product life 440 CFM at 7.0 Sones on high setting, 120 CFM at 0.5 Sones on low setting.