http://www.heatexchanger.ca/
There are a couple other guys making them too...
$1200-1500 for the 3 fan....good for 6K worth of lighting just running tap water to waste.
Perfect, but I think I'll runem with a 50 gallon res and a 2hp chiller (two exchangers on one chiller, flip flopped like my new room will be)
Thanks for the heads up! R+ for you