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Source: http://us.cnn.com/2014/04/24/tech/innovation/machine-makes-drinking-water-from-air/index.html
Israeli Machine Makes Drinking Water from Thin Air
(CNN) Giovanna Rajao and Michael Schwartz - The Israeli company Water-Gen has developed an Atmospheric Water-Generation Unit using a heat exchanger to chill air and condense water vapor to produce drinking water from thin air. "Air conditioning is extracting water from air. But the issue is to do it very efficiently, to produce as much water as you can per kilowatt of power consumed," said co-CEO Arye Kohavi. The system produces 250-800 liters of potable water a day, depending on temperature and humidity conditions, and uses two cents' worth of electricity to produce one liter of water. Developed primarily for the IDF, Water-Gen has already sold units to militaries in seven countries. For India, Kohavi says Water-Gen's units can produce a liter of water for 1.5 rupees, as opposed to 15 rupees for a liter of bottled water. Water-Gen has also developed a portable, battery-operated, water purification system that fits into a backpack and filters what was undrinkable water into potable water.