Some use cold water that comes from a river, well, or a city s water supply. Most of the air conditioners that are used in large buildings will heat the air by blowing it over coils that are filled with steam or hot water. It is a boiler that is heated by a gas, coal, or oil burner that produces the steam or hot water. In some air conditioners electric heaters will warm the air. Air conditoners can get rid of moisture from the air in many ways.
Warm air can hold more moisture then cold air.
When air conditioners cool the air, the air will pass over cooling coils. The water in these coils can get cold enough so that the moisture in the air turns into liquid form. Air conditioners can also remove moisture from the air. The air will pass through sprays of cold water. These sprays cool the air to condense some of the moisture.