How Evaporatives Work
Air from outside is drawn through the evaporative unit, across water saturated filter pads by a large fan. The evaporative unit is installed on the roof. As air passes through the filter pads evaporation occurs, causing the air's temperature to decrease. This air is forced through a network of insulated ducts to outlets in each room of the home. These outlets are large to allow the air to be freely discharged into each area. The cooler air then travels through the rooms to open doors or windows, where it is exhausted. The air is never re-circulated.
Evaporative air conditioning systems also lower the effective temperature, the temperature people feel as a direct result of air flow over the body. This effective temperaure drop can be 2 to 4 degrees below the still air temperature.
The remote control works by changing the fan speed and thus varying the airflow.
Because of the high air flow needed for evaporative cooling it is not possible to cool individual rooms nor is it necessary as the cost of running the unit is always low.
The cooling effect to your home will depend on the efficiency of the air conditioning system, the number of air changes produced by the fan, the prevailing temperature and humidity conditions. On days of high humidity the cooling effect will be significantly lower.
Air and Water Residential can provide you with information on the temperature reduction that should be expected in your home considering Perth's climate.
Read about the main features and average costs of Perth ducted evaporative air conditioning.
