Definition: Cooling system that uses water evaporation to lower air temperature. Not true refrigeration; cannot achieve temperatures below ambient wet-bulb temperature.
Limitations:
- Only suitable for non-refrigerated cooling (reducing ambient temperature by 5-15°C)
- Ineffective in humid climates (Cape Town, Durban)
- Adds moisture to air
- NOT suitable for food cold chain
Related Terms: Air Conditioning, Cooling, Humidity