Central air conditioners circulate cool air through a system of supply and return ducts. Supply ducts and registers (i.e., openings in the walls, floors, or ceilings covered by grills) carry cooled air from the air conditioner to the home. This cooled air becomes warmer as it circulates through the home; then it flows back to the central air conditioner through return ducts and registers.
Air conditioners help to dehumidify the incoming air, but in extremely humid climates or in cases where the air conditioner is oversized, it may not achieve a low humidity. Running a dehumidifier in your air conditioned home will increase your energy use, both for the dehumidifier itself and because the air conditioner will require more energy to cool your house. For that reason, it is very important to have your air conditioning system sized properly.
If you have a central air system in your home, and you want to save energy, set the fan to shut off at the same time as the compressor, which is usually done by setting the “auto” mode on the fan setting. In other words, don’t use the system’s central fan to provide air circulation — use circulating fans in individual rooms when someone occupying that room needs air movement to be more comfortable. If you want to achieve better filtration without paying to run the fan all the time, indoor air treatment products are available to achieve better air quality than standard store bought filters can provide.
Types of Central Air Conditioners
A central air conditioner is either a split-system unit or a packaged unit.
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