Evaporative Air Coolers are a considerably new concept that are now occupying a highly growing market. Traditional ACs are extremely expensive and not are suitable for modern businesses who are looking to cut their costs.
These are not a new concept which depends on a flow of water and air passing through it which creates a cooling effect. Now imagine a ducting system at your home where this cool air is being delivered consistently and compare this to AC system.]
It is estimated that you the electricity bill is hardly 1/30th of the costs of a normal AC. Plus it is good for the environment as well.