In the western half of the US, a good many of the homes (and warehouses and offices) are cooled during the day and night with "swamp coolers". Until I became a resident in Colorado, I had only a vague idea of what they were and assumed they were another air conditioning system much like I used when in the east coast or midwest. With humidity levels in the west hovering around 8 -10% and lower during the summer months, traditional air conditioning units that pull humidity from the air aren't required. Swamp coolers or chillers, actually run cool water over evaporative cooling pads and blow the cool, moist air into the area. Adding humidity in the west during the summer is actually a benefit. Think of those outdoor restaurants in the desert where misters are used to keep the patrons cool while on the patio -- same premise.
The only draw back is the cooling pads tend to become caked with limescale over the summers and understand a pad weighing 10lbs when they are originally installed, can end up at the end of the summer weighing closer to 150lbs with all the scale accumulation. One business in Arizona with 8 chillers on the roof cooling their shop put one HydroCare in line to see the impact on the pad over the 5 warmest months. They were pleasantly surprised to find the pads at the end of the period looked like new, no scale accumulation at all and a few that had scale present when they initiated the test, now looked new as well with no scale present at all. The efficiency of the chillers was improved, no scale clogged up the drain lines, and the pad life was extended.
If the system performs well in an industrial setting, wondering the success in a residential setting?