Product review (5 stars): The fan is powerfull!
I wanted to wait a couple months until I gave this item a real review.  I have had the UMC30 installed for nearly 3 months.  I vented this with a straight pipe directly through the upper cabinet and straight out of the roof.  You would be hard pressed to find a better hood for a home.  Low and medium are very quite but when it is on high you know its on!  Massive amout of airflow and say goodbuy to the  smoke alarm dinner bell. The LED lights at first glance are very dull but once in use they shine directly into your cooking pots when using the front burners.  Could use brighter or more lights.
It does have a nice timer feature that we use often.  When you are done cooking and serving up dinner you press the timer button one time and it keeps the light and fan on for and additional 1 minute then turns itself completley off.
We love this hood and would recomend it to anyone.