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Update:
A new
type of air conditioning system has appeared on the
market. It's sometimes called a mini split system. They
don't use ducts, with the associated duct cleaning issues.
They typically have very high efficiency, or SEER,
ratings. A good site to learn about them is
minisplitsystems.com.
If you do go with a conventional
central air conditioning unit, please consider one that
uses the new refrigerant. It's called, but may go under
trade names such as for R-410A GENETRON AZ-20®, SUVA
410A®, and Puron®. It's not required by the EPA until
2010, but units that use it are available now. Units that
use older refrigerants like R-22 may be expensive to
recharge with R-22 refrigerant once it's phased out. So it
makes sense to look into R-410A now.
FAQ about R-410A from the EPA |
About one-sixth
of all the electricity generated in the US is used to air
condition buildings. This represents an important area to make
sure we're not wasting energy.
Like many
appliances, the true cost is not the just the initial cost,
but the cost including the energy costs over the lifetime of
the appliance.
For the greatest
energy savings, look for the ENERGY STAR label. The US
Environmental Protection Agency has developed this program to
help consumers identify the most energy efficient appliances
and home improvement products. look for the yellow sticker on
the unit, which will show energy costs per year for each unit.
Earning the
ENERGY STAR means products meet strict energy efficiency
guidelines set by the US Environmental Protection Agency and
the Department of Energy.
ENERGY STAR qualified central air conditioners have a higher
seasonal efficiency rating (SEER) than standard models, which
makes them about 25% more efficient.
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