Product review (1 stars): Do not buy this range hood
Purchased this hood about 3 years ago.  Initially it was very quiet and lived up to my expectations but within 6 months it started to make a god awful annoying growling noise.  More noise than a busted chain saw.  Replaced the motor twice and within 6 months the noise returned.  Scanning the web I see many people with the same problem and they indicate that Nutone will not provide any relief.  Stay away from this product.