The Atmospheric Water-Generation Units created by Water-Gen use a "GENius" heat exchanger to chill air and condense water vapour.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/now-machine-makes-drinking-water-thin-air
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/israel
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-technology
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water-scarcity