Jei nori gauti šį darbą, siųsk trumpąją žinutę
DOC numeriu 1398. Žinutės kaina 3 Lt.

Įvesk SMS žinute gautą kodą

5 darbus gali gauti PIGIAU. Siųsk žinutę
MOK numeriu 1398. Žinutės kaina 10 Lt.

While moving heat via machinery to provide air conditioning is a relatively modern invention, the cooling of buildings is not. The ancient Romans were known to circulate aqueduct water through the walls of certain houses to cool them. As this sort of water usage was expensive, generally only the wealthy could afford such a luxury. In 1820, British scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia, a powerful irritant, could chill air when the liquefied ammonia was allowed to evaporate.

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