Product review (2 stars): It is not a durable good. It will begin to fall apart after about ...
This hood is exactly the same as the WS series I bought three year ago.  Same patent number and verbatim instruction manual.  It is not a durable good.  It will begin to fall apart after about three years.  The wiring for my lights has just failed.  My original nutone copper hoop was 40+ years old and never needed a repair.  This product is garbage.  If I replace, I need to repair my tile backsplash also.  I won't buy it again, but they don't care about that.  Call me Nutone, if you do care, at 408-209-7856.