Once the air is cooled it is forced into the room and then exhausted via an open door or window. Evaporative systems have controls that will vary the airflow by changing the fan speed. On days of high humidity the cooling effect will be significantly lower. These types of systems are installed to cool larger areas or entire homes. The evaporative unit is installed outside a building, either on top of the roof or at ground level.
Air is moved through a network of insulated ducts to air outlets to each room in the building.
These outlets, or registers, are large to allow the air to be freely discharged into each area. Because of the high air flow needed for evaporative cooling it is not possible to cool individual rooms. The cooler air then travels through the rooms to open doors or windows, where it is exhausted. A central panel installed inside your home provides control over the system. Some units also have timers and comfort controls.