i had a similar problem with my cold machine. i was able to install it just inside at the aft cabin bulkhead. i ran a short hose through a hole i cut in the bulkhead and it vented into the port cockpit locker. i added a louver door vent on the locker side like they use on clothes dryers. worked great.
i also had a computer fan that i added to the box where the unit lived. it insured that cooler cabin air would blow over the unit. i put it directly above the computer module. as mr. koillman will tell you, keep that module cool.
don't know if they still have this on the cold machine. it was designed to be not only air cooled but also water
cooled if you wanted it. i didn't want it, per advice from mr. kollman. to piower the pump
there is, or was, an output on the control module for it. i plugged my computer fan into that output and it turned the fan on every time the unit started up. no special wiring
had mine for ten years before we sold the boat
and had zero problems with it after the initial start up problem. which ab fixed immediately. free.