Another way to increase cooling efficiency is to add Ice into the tank. A lot of people have tried it in their coolers. Actually, some coolers have compartments for ice. Adding ice to the water will make the pads cooler which results in cooler air flowing through them. This is only true when you are close to the cooler. In the end, however the addition of ice won't reduce the humidity or temperature in the room. In addition, too much ice may also cause the process of evaporation to slow, which can affect the efficiency of the air cooler. It is important to know the right time to place ice in the cooler. Adding ice will prove to be more efficient when working with extremely high temperatures.