[revelation]

Well, duh. If I had to pay nothing for water, I would also just run the tap through a radiator all day and save on the AC electricity.

But then I also have a conscience and realize what a gigantic waste that is, so I don't.

[d-sc]

This is basically how we cool our house in Montana during the summers. Cold water is pumped up one well and hot water is returned down another well. It uses much less electricity than a conventional AC system.

[lucb1e]

Wow. I've thought about this, using tap water to cool the house, but it's so wasteful it was never more than a playful thought. But then the Netherlands' summers are reasonably survivable even if they make me feel shit all day and all night.

[d-sc]

At the end of the day, net zero water is 'used' it is all returned to the ground.

Its actually a strong net water savings: the production of electricity in Montana uses around 16 gallons of water per kilowatt hour.