Product review (4 stars): but my husband's carpentry skills were adequate and it looks very good. It was not an easy retrofit however
We bought to replace a custom island hood vent which had failed.  We had to modify the construction of the hood to fit the Broan insert, but my husband's carpentry skills were adequate and it looks very good.  It was not an easy retrofit however, trying to get the unit situated into the hood and connected to the existing vent pipe.  We had to purchase a reducer connection.  The hood worked great for 4 months, until yesterday when the switch for the fan evidently blew out it's electronic board or something and now it only runs at highest speed, in fact it sounds louder than highest speed did previously.  The switch seems to still have it's "stops" for the 3 speeds but it is running so fast is sounds as if it's going to take off through the roof.  Oh well, here we go trying to find out what has happened and get the parts from Broan.  It sure isn't something you can just remove and return to Amazon.