Product review (3 stars): This vent had some problems
The vent a hood arrived scratched and with the fans missing screws and the remaining screws loose.  There are  backdraft vent flaps that bound and would not open / shut properly. they also would not seal if they did work. I removed them and installed an inline backdraft damper .
with a little back and forth emailing and phone calling evVive Home - Amazon Marketplace did thier best to make me happy.  Allthough they absolutly refused to take a return, i took the next best thing (they first offered a 100 rebate), I asked for 250,  counter of 150, with upper managment approval, a 200 rebate was settled on.  Where the vent now seems to operate properly, we will see with time.  One thing I do notice , thia has 2 fans. one has 2 speeds, and the other just a high speed.  if you turn the one on high, and then turn the other on, the first one seems to slow down.  Not sure if this is supposed to be how it works .. I still need to call vent-a-hood and find out.  AND .. this is definatly a 2 person install.  you remove all the fans first and then bolt the carcase in place .. but it is still very heavy, and you will need 2 people , or a way to clamp it in place.