|
What should I look for in a new heat pump or
air conditioner?
While heat pumps and air conditioners require
the use of some different components in your heating and cooling
system, the three most important factors you should evaluate are
essentially the same: quality, efficiency, and comfort features.
Quality
When you purchase a new car, the quality of it
helps determine how well it will perform and for how long. An air
conditioner or heat pump is really no different. Purchasing a
brand name that has a reputation for quality and reliability can
save you headaches and extra expense down the road.
New Bryant air conditioners and split systems,
for example, undergo 34 quality tests and checks during
production, with more than 20 of these being performed on every
unit - not just on random samples. Plus, we back every air
conditioner and heat pump in writing, with a 5-year limited
warranty on the compressor (some deluxe models have 10) and a
one-year limited warranty on the parts. Extended warranties are
also available; call your local Bryant dealer for details.
Efficiency
Cooling efficiency for air conditioners and
heat pumps is indicated by a SEER (Seasonal Energy Efficiency
Ratio) rating, which tells you how efficiently the unit uses
electricity. Heat pumps also have heating efficiency ratings,
indicated as an HSPF (Heating Seasonal Performance Factor). In
general, the higher the SEER or HSPF rating, the less electricity
the unit will use to cool (or heat) your home. For more details,
go to Comparing Performance. In 1992, the government established
minimum efficiency standards for units installed in new homes at
10.0 SEER and 6.8 HSPF. Most air conditioners and heat pumps
manufactured before 1992 had SEER ratings below 7.0 and HSPF
ratings below 5.0.
Air conditioners and heat pumps manufactured
today have SEER ratings that range from 10.0 to about 17. Heat
pumps are available with HSPF ratings from about 6.8 to 10.0.
Usually, the higher the efficiency, the more
expensive the unit. If you live in a warm and/or humid climate,
you will probably see the higher cost of a high-efficiency air
conditioner or heat pump paid back (through lower utility bills)
in a few short years. Your dealer can use cooling data from your
area to help you determine about how long it would take you to
recover the additional cost in energy savings. Of course, after
the payback, you continue to save on your energy bills for the
life of the system.
One other point to keep in mind is that your
heat pump or air conditioner is a "split system," which
means that there is an outdoor unit (condenser) and an indoor unit
(coil). If you're replacing an existing system, both units should
be replaced to make sure your new condensing unit gives you
optimal performance, efficiency and comfort. For more information
about matching your indoor and outdoor components, go to Why do I
need to "match" my condensing unit and indoor coil?
Note: Air-source heat pumps - the type most commonly used in homes
- are typically installed with additional back-up heating (usually
electric resistance strip heating) for days when the outdoor
temperature drops below 30 and the heat pump cannot extract enough
heat from the outside air to heat the home. SEER and HSPF ratings
do not refer to the efficiency of electrical resistance backup
heat, which is calculated differently.
Comfort Features
Some air conditioners and heat pumps offer
additional features that provide greater comfort (as well as
additional energy savings). Two-speed units can run on low speed
(using 50% of the energy) up to 80% of the time, so they operate
more quietly and run for longer periods of time than single-speed
models. Longer operating periods translate into fewer on/off
cycles, fewer drafts and much smaller temperature swings -- only
two or three degrees instead of the four-degree swings common with
single-speed units. Plus, better air circulation helps prevent air
"stratification" - warm air rising to the ceiling and
cold air settling on the floor. In short, you get consistent, even
cooling throughout your home.
If you purchase a multi-speed or
variable-capacity furnace or fan coil with your unit, you will
enhance both the comfort and the efficiency of your air
conditioning or heat pump system even further.
|