In addition to cooling the air in your home or office, your air conditioning system also helps remove excess humidity. As moisture laden air flows through the cooling coil, some of the moisture condenses on the fins of the coil and then falls to a drain pan below where it flows out of the building, often through waste water connections. Because relative humidity has a lot to do with how cool the air "feels," a cooling coil and the corresponding condensing unit must be correctly matched to the environment.

More recently, a great deal of attention has been placed on mold that is often found in homes that have areas of excess moisture. This mold has been linked to both allergies and illnesses and has become quite the "hot topic" with insurance companies and HVAC companies alike. This further emphasizes the need to have cooling systems correctly sized to meet the humidity removal and capacity requirements that will satisfy the owner.