Product review (2 stars): Not happy with it...
After reading all those wonderful reviews I just think that, unfortunately, I bought a bad/defected unit.
First of all - while  talking about exact the same NuTone range hood, I need to tell you that I DIDN'T ordered it from Amazon.
I bought it brand new from an appliance store.
However,I am not happy with it, and will need to replace the whole hood.
I bought the range hood several months ago while my kitchen was remodeled. It was installed right away, but I didn't used it for a long time.
The first time I turned it on, I noticed that something was wrong with the air circulation. It was blowing the kitchen air right back into the kitchen.
I also noticed that even if turned off, a hot air from outside ( I live in South Texas ) was creeping through the filter opening into my kitchen.
Measured the temps with an infrared temperature meter and indeed, I was getting a hot air from outside.
After a close investigation, we found out that a "flapper" blocking the air from coming in was missing. It became obvious that the appliance has a missing part.
The second really troublesome discovery was that the black paint is peeling off. That's another defect hard to accept.

I don't have the original box anymore, and can't find the receipt either, so I am not able to return that unit to the store.
I will have to bite the bullet and buy another one. Not happy with the quality of the appliance....