Product review (5 stars): Commercial power for home use.
Range hood was fairly easy to install with 2 people.  I tested it out when out of the box and after it was mounted.  The centrifugal fans do have better draw power than other range hoods with a standard fan blade.  It was an under cabinet mount for venting outside.  2 reducers were installed  bringing the exhaust pipe down from 8 to 4 inches.  I purchased this brand/model because it was cheaper than most other brands which had a lower CFM and I'm not expecting to use it at full power..  With the reducers, it is somewhat noisier but it is to be expected.  I highly recommend.  You get the power and performance of a commercial range hood at a residential price.