Here is the product link!
http://www.computerexhaust.com/products.htm
I am no engineer but I do not see how this thing is going to work. The fan is not going to be strong enough to push air into a well build house's wall. Also I do not see it a good idea to have people aimlessly drilling holes into their wall with a long 1.5" hole saw. If there is a computer near by then there is a fair chance of a power wire being right there somewere, not to mention any other wires, cable, telephone, ect...