Water From Air Generator?

An interesting piece of science in the form of a water generator has been installed in the Green Park market plaza. This generator turns the air around into water. A score of people every morning are seen filling their water bottles from it. The information posted next to it claims it to be safe and potable water that can be used by one and all. Going by the way people line to drink from it, shows the claim is right. One only wonders about the cost feasibility. Who has installed? May be market association can shed light on that. The installation is on Green Park market walking plaza on the airtel shop side.