The Pad & Fan system, or mattress cooling, is one of the best-known forms of evaporation cooling, and it is widely used to cool greenhouses especially in southern countries, where the outdoor humidity is often low.
Method of this system;
- The dry exterior air is humidified by means of a pad wall.
- The humidified air absorbs part of the heat in the greenhouse.
- The saturated hot air is extracted from the greenhouse with fans.