To cool your tower you would idealy want to purchase one of the blowers that micro matic has for sale. they are like $100 though. If you don't have that kind of money to spend you can do what I did. Get some copper wire that is pliable and wrap it around the tube that goes up into the tower. Copper conducts cold very well. Then get a small desk fan and aim it up toward the hole for the tower. Doing this will let more of the cold air up into the tower and keep the beer in the line up there colder.
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