[brudgers]

Large buildings commonly use chilled water HVAC systems. The scale at which these systems make sense is larger than a single family residence.

http://www.york.com/for-your-workplace/chilled-water-systems

[anotheramala]

Yes I edited my comment. Looks like the approach of vaayu is to directly do evaporative cooling. So a chilled water swamp cooler. The commercial systems use the chilled water in closed coils.