Q: If the unit is using water, then how does it work with humidity?

A: The temperature drop is based off of temperature in surrounding area. The higher the humidity in the area, the less temperature drop from the fan. In the dry western areas, evaporative coolers can drop 30 degrees instantly. In higher humid climates like the south, we naturally drop 10-15 degrees with only water, and up to 25 degrees with ice water.