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Rumour has it that Westjet will start flying into Costa Rica in November. But it is still unclear as to which airport.
Yes David and thank you. The question is about A/C. The piping can be installed vertically or horizontally in the ground. But yes you are right a stream or pond make for a much better heat transfer. My son in law took a course on its usage and indicated that the system is now becoming more of a mainstream source on rural farms in Canada as well as the US. Inroads into cities has started here in Alberta, Canada. The idea is that after a certain depth the temperature is very constant thus providing a stable source for heat transfer. But yes piping into water works as well.
Geothermal is a system where lengths of pipe are buried underground at a depth where temperatures are constant. A liquid (usually water or a mix of water and ethanol) is pumped through the conduit system. It passes through a heat exchanger where the constant temperature liquid can be converted to either heat or cool your house. Much like a refridgerator works to cool the inside and put out heat out the back side of your fridge. The liquid dissipated the excess heat or cold into the earth. The heat produced can also be used to heat your hot water or even a swimming pool. From what I have heard this system is not in common use or not well known in Costa Rica.
