We are always asked how far away from the fridge the tower can be mounted. Please keep in mind: beer is a food product and needs to be refrigerated. That being said, the beer needs to be kept cold from the keg all the way to the faucet. Both of you want to build what is referred to as a "remote system." The simplest remote system is with an air shaft and a blower. Please see this diagram:
http://www.micromatic.com/category.php?cid=530
This shows a double duct system, unfortunately our diagram of a single duct system has not been posted to the site yet. The objective of both systems is to have a continuous flow of cold air from the refrigerator circulating around the beer line. If you just wrap the beer line with insulation, the beer will heat up in the line and you will have foam in every glass.
You can create an air shaft from PVC wrapped with insulation. Mount a blower (
http://www.micromatic.com/category.php?cid=151) in the refrigerator. You will need to use 3/8" I.D. hose for most of the run from the keg, and then splice on 3' of 3/16" I.D. for the final run to the faucet.
Mike Godwin, Micro Matic USA, Inc. Northridge, CA