There are several style pumps that will create 15' of lift. Some pumps that will work are the Little Giant wizard, Mag 7, and you can even use a 1/6 th hp flotec submersible pump from the Home Depot (best deal for $75, can get online).

The radiator and fan is a great way to inexpensively remove heat. Hydro Innovations is going to offer a radiator and fan combo in the next month or so that will sell for about $150, its 10" x 6" x 2.5" with two high power energy efficient fans.

The trick with any heat exchanger used for the HydroGEN is that you want to install it inline on the exiting hot water line. With the super heated water running through the radiator the fans are able to remove loads of heat using very little electricity. The alternative way of installing the heat exchanger would be to have it on a closed loop cooling the reservoir instead. Using this second method is only about half as effective at removing the heat unless you are able to blow very cold air over it.