Product review (5 stars): Quiet,clears out entire Kitchen.
This is just control unit,has small footprint,nice for custom wood hood vents(30 inch)uses 8 inch into attic,then you mount(in attic)80 pound air handler,now 10 inch ducting,need to buy 10 inch roof jack($100).
All adds up to very quiet(at low setting completely silent)kitchen/whole house exhaust fan,the attic unit is basically a furnace size air handler,at mid setting all Gas stove odors + entire kitchen area is cleared.
At high settings it becomes a whole house fan!!!