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Air Conditioner
Home Air Conditioner - Central Air Conditioners
About one-sixth of all the electricity generated in the US is used to air condition buildings, this
includes the use of home air conditioner.
Central home air conditioner circulates 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. It is then flows back to the
central air conditioner through return ducts and registers. A central home air conditioner is either
a split-system unit or a packaged unit.
Central Home Air Conditioner — SEER
National minimum standards for central air conditioners require a SEER of 9.7 and 10.0, for
single-package and split-systems, respectively. But you do not need to settle for the minimum
standard — there is a wide selection of home air conditioner units with SEERs reaching nearly 17.
Before 1979, the SEERs of central air conditioners ranged from 4.5 to 8.0. Replacing a 1970s-era
home air conditioner with a SEER of 6 with a new unit having a SEER of 12 will cut your air
conditioning costs in half.
ENERGY STAR qualified home air conditioners have a higher seasonal efficiency rating (SEER) than
standard models, which makes them about 25% more efficient.
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