Product review (5 stars): Requires 8" ductwork!
Can't be the price for the amount of cfm it moves.  The instruction manual could be better, but a professional installer or a diy-er who knows what they are doing should be able to figure it out.  Buyers should make sure the that this unit is equipped with an 8' diameter duct.  You really need this large size to move this amount of air.  My house had an existing 6" duct that I had to climb up into the attic and change to 8".  The lights could be brighter, but this is an awesome value buy!  This thing has lots of suction power!!!