Product review (5 stars): Blowers like this should be a part of all home kegerators.
It very much delivers cold air to the tower. The tower is now quite cold to the touch maybe I should insulate it more to keep loss to minimum. First new keg after installation and I have nice, cold, carbonated but not foamy beer, with first pour.  This type of addition should be on the plans of any conversion or as a aftermarket add-on.  I used it on a Danby.