Description

What is evaporative cooling?
Evaporative cooling converts hot air into a cool breeze using the process of evaporating water similar to how you feel when you step out of a swimming pool on a breezy day. In a standard greenhouse cooling system, exhaust fans pull hot air out of the greenhouse creating negative pressure inside the greenhouse. Fresh outside air is drawn through wetted pads and is cooled. This system is also referred to as a negative pressure cooling system. Evaporative cooling is environmentally-friendly since it uses no CFC's or HCFC's and costs about *0% less to operate than conventional air conditioning systems.
 
Fan & Pad cooling systems:
A fan and pad cooling system consists of a continuous row of cellulose pads along one wall of the greenhouse. Water is distributed along the tops of the pads. Exhaust fans at the opposite side of the greenhouse evacuate hot air. As replacement air is drawn through the pads, the outside air is cooled by evaporation by as much as *0 degrees in non humid climates.