The simple answer is NO. Correctly installed and operated a mist cooling system will not cause wetting.
Correctly installed means that :
- The correct NUMBER of NOZZLES are fitted
- The nozzles should include ANTI-DRIP ADAPTORS
- The correct SIZE NOZZLES are fitted
- NOZZLES are correctly SPACED.
- Adequate AIR EXCHANGE is available.
Correctly operated means that the system is duty-cycle timed to match the conditions of the day. Cooler days require the system to be operated for shorter time cycles. Adequate air exchange must be present. This is achieved by the inclusion of fans into the system OR ensuring that natural air exchange is stimulated by opening windows, raising blinds and opening doors.
Mist cooling operates by ensuring millions of water droplets are micro sized ( atomized ) to dimensions of around 8 microns. At this size, droplets, when coming into contact with heat will FLASH EVAPORATE (turn into a gas). This energy exchange results in the consumption of heat energy which is thus effectively removed from the air. We do not cool the air — we remove heat from the air. Same bottom line effect as air conditioning—different methodology. The result is an immediate refreshing drop in temperature of 10 - 12 ° !
Once flash evaporated, the gas molecule needs to be expelled away from the area effectively making room for the next micro droplet so that the process can be repeated. This is why air exchange (using fans or natural air movement - by opening windows) is critical. Failure to provide sufficient air exchange will result in humidity build-up.