You forget a few things of why this is being done.
First off, proof of concept, second off, its much smaller then really any other chiller can possibly be. And more maneuverable in a given small space. They will most likely find that they need more cooling space, on the hot sides, so I hope there willing to move to a more pelt system. 8-10 226w as I said earlier at much lower voltages will give you great water temps a few degrees below ambient for a similar wattage of a 437w pelt. So take it from there, and you can crank up the voltage to get lower liquid temps.