Actually, I am looking at put it next to the attic fan.
it is right above the computer room. I am thinking that possibly a car radiator could handle 4 computers, with one being risc based, and would still handle others if needed. I am only worried that it won't cool it enough. If i hook it up to the exaust fan in the attic, and set it to run all the time. . . that might work. I would just need to run a few water temp probes to see how it is doing.