A powerful, energy-efficient, electric fan moves the air towards the core.
2. Hot air passes through the core
The core is an air-to-air heat exchanger consisting of alternating dry and wet channels.
All of the air passes along the dry channels and gains no additional moisture.
3. Warm, moist air exhausted outside
As the air exits the dry channels, a portion of the conditioned air is returned through the wet channels.
Through evaporation and conduction, it gains both moisture and heat. The channels are continuously soaked with water. This moist, warm air is then exhausted outside of the building.
No moisture is transferred across the membranes between the dry and wet channels; only temperature (heat) is transferred.
The heat passes out of the air in the dry channels through the membrane and into the air passing through the wet channels.
In this way, the air in the dry channels becomes progressively colder but gains no moisture.
4. Fresh, cool outside air passes into the building
The air passing along the dry channels in the core is cooled, with no moisture added.