Tips For Buying An Air Conditioning System

What consumers should know before they install a central cooling system.

With summer heat underway, many central air conditioners units will be repaired or replaced. Additionally, the
rise of summer heat also means a rise in electric bills. One of the most expensive appliances you’ll purchase
for a home is a central cooling system (only to be rivaled by the heating system).

The beauty of a central air conditioning system is that it can distribute cool air through the whole house as
opposed to window units which are generally designed to cool a single room. Despite the larger initial cost, a
central cooling system can still save you money by reducing your monthly utility bill. If new or modified
ductwork is required, then your initial investment will rise. Central air conditioning units also vary in size and
efficiency. A common, costly error is to install an oversized unit in your home.

Air conditioner sizes, also referred to as cooling capacities, are measured in British thermal units per hour
(Btuh). One ton is equal to 12,000 btuhs. A unit that has too little capacity may not keep the whole house cold,
while an oversized unit will cost more and be more expensive to run.

A unit’s energy consumption is rated in SEER (seasonal energy-efficiency rating). The higher the SEER rating
the less energy required to run the unit. The Department of Energy standards are currently a minimum of 13
SEER for central air conditioning units. The ratings can range from 10 to 18 SEER. Units with a 13 SEER
rating are typically installed in new homes and as replacement models. According to a survey of over 500
contractors, a rating from 11 to 14 are mostly recommended because they are the least expensive to own
overall and require the least repairs. While a 10 SEER unit initially costs less (maybe by a few hundred
dollars) your monthly electric bill will be on the average $5 more compared to that of a 12 SEER unit. (Higher
savings occur in the south, while northern regions may have little savings.) Additionally, some utility
companies offer rebate programs to those with higher efficiency units installed.

The most expensive part of an air conditioner to replace is the compressor. Air conditioners typically feature a
scroll or reciprocating compressor, depending on the unit size and efficiency. Check to see if the compressor
has an additional warranty (e.g. 10 year compressor warranty), separate from the standard cooling system
warranty.

And if you are wondering whether you should turn off the air conditioner so you can open a window to enjoy a
break in the warm weather, here is some advice: do not continually turn on and off your air conditioner to
adjust to the changing warm weather patterns outside. If you want to open a window to get some fresh air, it is
better to leave your air conditioner on rather than turning it off. If the inside of the house gets hot and you have
to turn the air conditioner back on then your air conditioner has to work harder to cool down your house and
everything in it.

Finally, if you are gone during long periods of the day (or night) invest in a programmable thermostat. With a
programmable thermostat, your cooling system can use less energy while you’re gone and then adjust itself
so the house temperature is comfortable when you arrive.