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I dream of a building where there is a huge central heat pump. It cools down all fridges, computers, and freezers and on the other end distributes heat to whatever needs it. In every room, you find faucets for hot and cold fluid that you can use to heat and cool down things as needed.
(Flamewar contribution : 110V AC and 230V AC are both lame, DC current makes the chances of survival to an electric shock much higher* and is the One True Way
* An irrelevant side-effect of DC being slightly reduced power grid, generator, and transformer efficiency) Edited 2011-08-03 12:11 UTC