How does a Breezair  
Evaporative Air Conditioner work ? 
It uses the natural principle of cooling   by evaporation. Wet your finger and   hold it in the air and it becomes cool that is because evaporation is   occurring; it is a natural phenomenon .  In the Evaporative Air Conditioner a pump circulates water through a set of   cooling pads through which air is forced   by a motor driven san. The hot outside   air passing through the pads evaporates the water in the wetted   pads at a very high rate. This cools the   air which is then pumped into your   building .

How much can Breezair Evaporative   Air Conditioning reduce the   temperature ?
That depends on the temperature and   humidity of the outside air (the ambient temperature). For example, at a temperature of 25C   and a relative humidity of 50% the air
from a Breezair Evaporative Air   Conditioner will be at 20°C, i.e. a 5°C   drop. Or, at a temperature of 35°C and   a relative humidity of 30% the air from   the Cooler will be 25°C, i.e. a 10°C drop .  Cooler Discharge