Product review (5 stars): Great exhaust unit
My Nutone PME300 is mounted in a hood above a stove top on an exterior wall.  The vent is 6" in diameter.  Boy does this thing blow on the high setting.  Very quiet on medium and almost silent on the low setting.  The only improvement that I can think of are the lights.  NuTone should include LED lights.  I hate fluorescent lights.  Not sure if I can find LED bulbs that will work in this unit.