Air King AK100D Energy Star Qualified Dual Speed Exhaust Bath Fan with 100-CFM and 1.5-Sones, White FinishAir King AK100D 100 CFM 2 Sone Dual Speed Energy Star Rated Exhaust Fan The ENERGY STAR qualified Dual Speed Quiet Series provides cost effective, energy efficient ventilation at low sound levels and features a contoured grill that almost disappears into the ceiling. At the highest point the grill projects only 1 2" down from the ceiling. The electronically balanced centrifugal blower wheel assures maximum ventilation with minimum sound. Features: