Product review (4 stars): Very good quality blower that needs some extras when installing
I'm quite happy with this blower, which I fitted to my non-Broan hood.  The motor and impeller parts are made by ebmpapst in Germany,  the largest manufacturer of fan motors worldwide (so they claim, but their product line is absolutely huge) very high quality and well made.  5 stars.  I assume Broan designed and makes the aluminum sheet metal enclosure, it's also well executed,  all the screw holes lineup just so,  of a heavy gauge.  Well boxed for shipping btw.

I was surprised to see how non-waterproof this is however.  Water running down a roof and hitting the top edge will just flow right into the enclosure.  But this is by design,  water can just flow right across the base plate inside the enclosure and out the bottom. The 10" opening for the air duct has a large upward lip on it,  so water can't get in there.  But Broan was careless with the 1/2 hole for the electrical connection,  water can get in here.  I bought a water-tight romex clamp which has a gasket for panel mounting,  that took care of that,  and I also used a high quality sealant across the top and down both sides.  I left the bottom open so water can escape, if any were to get in their now.

I had a roofer install the unit. He did not like the very short mounting edges, hardely 2 inches of the baseplate on all sides.  I had to find a metal shop that added a wide baseplate and used lots of sealant and rivets to attach.  This Broan unit is aluminum,  which takes special equipment to weld,  so rivets is probably the only choice.

I installed a Broan 72W variable speed control in my kitchen,  which works as advertised,  though there is an audible 60 cycle hum from the motor that I'll bet originates with this controller.  When running the fan in a medium to low speed range this hum is irritating imho, after all these large blowers and controls are Broan's premier products in kitchen ventilation. But that's more an attribute of the control.  This blower would be 5 stars except for all the additional work needed when installing. I'm expecting many years of trouble free use.