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13 Is Your Lucky Number
ACCA is the nationwide nonprofit association of heating, ventilation, air condition, and
refrigeration contracting businesses. For over 40 years, ACCA has provided education
and research in support of efficient, safe and healthy heating and cooling systems.
Learn more at www.acca.org.
ComforTools™ ComforTools help consumers make informed choices about indoor heating and cooling systems.
ComforTools promote energy efficiency, indoor air quality, and safe, healthy homes and buildings.
© 2006 Air Conditioning of America
Association, Inc. All rights reserved.
Material is presented for informational
purposes only and may not
be reprinted without permission.
Authorized for distribution solely
by member contractors of the Air
Conditioning Contractors of America.
Air Conditioning
Contractors of America
For more
information,
contact:
On January 23, 2006, new federal regulations for air conditioners went into effect: now manufacturers can only make equipment with
a seasonal energy efficiency rating (SEER) of 13 or higher. SEER is like a miles-per-gallon rating for your air conditioner or heat pump.
Homeowners are not required to buy a 13 SEER system now, and there are still a few lower rated models or units available. However, if
your air conditioner is ready for replacement, consider HVAC equipment that is 13 SEER and higher. It will save you money in the long
run because it’s more energy efficient.
There are five things you should
consider when you purchase new
equipment.
Can I buy just the outdoor or indoor unit?
It’s not a good idea. Someone may recommend changing only the
outdoor unit—after all, it has a sticker that says 13 SEER. But that
means that the unit can achieve the new standard if properly
matched to the indoor unit. Replacing both will cost more, but if
you don’t have a matched system:
■ The new unit may not work properly or keep you comfortable
■ The new unit could fail more quickly
■ You may void the manufacturer’s warranty
■ Your energy bills may go up instead of down
Ask your contractor for an “ARI Certificate of Certified
Performance” to prove that you’re getting a matched set. You can
also go to www.ari.org to find out if your system is matched .
Simply click on the ARI Directory of Certified Product
Performance button, then unitary products, heat pump or air
conditioner, and fill in your equipment’s information on the form.
Does size matter?
Yes, however bigger is not better when it comes to cooling
capacity! Your contractor needs to look at your whole home to
ensure that you’re buying the right system. Professional contractors
always perform what’s called a “Manual J® load calculation,” even
when they’re installing a replacement: the existing system may not
have been sized properly to begin with, and you may have made
changes to the house that affect cooling. The calculation takes into
account windows, doors, room sizes, insulation, and the like.
Air conditioning equipment that has too much cooling capacity
will cycle on and off too often—it won’t last as long and won’t
dehumidify the air enough. Your home will be cold and clammy,
and moisture problems may develop.
In addition, many of today’s high-efficiency air conditioners and
heat pumps are physically larger than older models. The contractor
will measure the existing equipment’s location to ensure the new
unit will fit.
What else is different?
The refrigerant is. Most manufacturers
are using something called R-410A in
their new systems. It’s much more
environmentally friendly than the old
refrigerant (R-22) because it doesn’t
deplete the ozone layer. Heating,
ventilation, and air conditioning (HVAC)
equipment manufacturers must stop
using R-22 by January 2010. Although
R-22 will be available for servicing existing systems until 2020, prices
will probably rise as supplies decrease. Choose a system that makes
sense for your long-range goals, budget, and comfort as well as the
environment.
What about ducts—do I need to be concerned
about them?
Air conditioners are one part of a whole system. The best air conditioner
in the world will not overcome a poor air distribution system—
the network of ducts that carries air from your home to the cooling
equipment and back into the rooms. Leaky ducts can cause pressure
changes in your home that may result in moisture problems, uncomfortable
rooms, or higher energy costs. If the ducts are restricted, the
cool air you paid for can’t get to that hot room. It’s also possible the
ducts may be drawing in air from hot, dusty, humid, or unhealthy
places. When you purchase a new air conditioner, also have the
contractor inspect and test the ductwork.
How will I know if it was installed right?
The contractor should perform several tests for your health and safety
and to verify proper operation for maximum comfort and energy
efficiency. The contractor will check:
■ Air flow through the unit
■ Air flow through the ducts
■ Refrigerant pressures and temperatures
■ Electrical measurements and connections
■ Thermostat operation
■ Air temperatures in the home and at the outdoor and indoor units
Good contractors will review their findings with you and make sure
you know how to operate the thermostat and maintain the system.
Buying a new air conditioner is something you do only every 8 to 15
years. Consider your options carefully and make the best decision for
your family’s health, safety, comfort, and future energy bills.
Visit www.acca.org for more information
on purchasing an air conditioner
or heat pump.

If you are looking for a free estimate for just about any type of repair to your plumbing system, your electrical system or your heatign and air conditioining system simply click on one of the links below.