Question re: Closed Pond Loop Cooling
I'm contemplating trying to cool my house with a closed pond loop system. I had been thinking that all I'd do is circulate the fluid in the system and blow air over a radiator into my existing duct work. Is this correct? I'm looking to do this as inexpensive as possible and as much DIY as possible. At this point my system (as planned) would be about 130 ft of copper tubing in the pond, some plastic piping to get it between the house and the pond, some sort of fluid pump to circulate the coolant (water or some other medium) and an uncased evaporator coil in my furnace. Total cost should be under $500. Am I missing something?