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Cooling a space for human comfort, cooling food so it doesn't go bad soon (refrigerator) or cooling electrical devices to prevent overheating (computer servers). See also [air-conditioning]

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I believe they are called zeerpots. terracotta "or other porous ceramic" pot with another identical but smaller pot inside, fill gap between pots with sand pour just enough water into sand to dampen i …
answered May 17 '16 by Bob