What is a potential issue caused by an oversized air conditioning system?

An oversized air conditioning system can lead to inefficient dehumidification for several reasons. When an air conditioning unit is too large for the space it is meant to cool, it tends to cool the air quickly, resulting in a lower temperature being reached before sufficient humidity is removed from the air. This scenario is often referred to as "short-cycling," where the system runs for a short period to quickly cool the area and then shuts off, not allowing enough time for the evaporator coil to effectively remove moisture.

Dehumidification relies on the air passing over the cooling coil for a sufficient duration to facilitate moisture removal. With an oversized system, the compressor turns on and off so frequently that the air does not circulate long enough to capture and condense the humidity effectively. This leads to a lower indoor air quality and discomfort, as the humidity remains higher than it should be.

In contrast, a correctly sized air conditioning unit operates for longer cycles, allowing for better moisture removal, thus enhancing comfort and indoor air quality.