Cooperative Living May 2015 - 12

CURRENTS by Tom Tate, Contributing Writer
Heating and Cooling Systems - Do I Maintain or Replace?
A
s the cooling season nears, it is time to
decide whether to perform maintenance
on your central-air-conditioning system
or replace it. Given the cost of replacement, this is
not a trivial decision. So, how can you tell if your
system needs to be replaced? Fortunately, there
are telltale signs, so read on.
Generally speaking, a system 10 years old
or older is nearing the end of its useful life ...
maybe. If you are starting to spend a fair amount
on repairs, your system might be ready for replacement.
If you have problems maintaining
consistent temperature levels throughout your
home, it might be time for a replacement. If your
bills have been higher than usual, you might need
a replacement. High humidity, excessive dust,
noisy operation... you might need to replace. At
this point, I am starting to feel like Jeff Foxworthy.
On the bright side, a new system will be significantly
more efficient, saving up to 20 percent
on your cooling bill. If your system is exhibiting
some or all of these signs, call in a trusted contractor
for a final pronouncement and an estimate
on replacement.
When picking a system, opt for one with a
high SEER (seasonal energy efficiency rating).
The higher the number, the greater the efficiency
- a SEER of 16 is not uncommon these days. An
offer of lower-rated equipment might reflect
what a contractor has on hand rather than what
is right for you; so if uncertain, ask for details.
If you do not have a programmable thermostat,
now would be the perfect time to have one
installed. I'd recommend one of the smart models,
either the Nest or Lyric. Having used both in
my own homes, I like the way they operate. Plus,
properly used, a programmable stat can save
even more money. And consider having the system
designed for high-efficiency filters, especially
if you have seasonal allergies. See the accompanying
BANG FOR YOUR BUCKarticle on filters
elsewhere in this month's issue for more details.
If the old system isn't ready to start pushing
up daisies just yet, give it some tender, loving
maintenance. Clean the outside compressor
with a garden hose to remove dirt and debris
from the coils and fins. Don't blast the fins with a
high-pressure water stream, as that can bend
them and reduce heat-exchanging capacity. If
you already have dented fins, buy a fin comb
and gently comb them back into shape. Or, a
wire brush might serve the same purpose.
Whichever route you go, wear gloves, because
those fins are sharp. Finally, clear a two-foot
space all the way around the compressor, if possible.
More air flow equals better operation.
Ideally, it is best to have your HVAC unit serviced
professionally on an annual basis. Many
contractors, and probably yours, offer special
rates for annual service agreements.
Inside, about all you can do is replace the
air filters (more on this also in the filter article).
The coils inside the ductwork may be in need of
cleaning, too, but given the fact they are often
hard to get at, have your contractor do it or recommend
someone.
If you've hired a contractor for some of the
maintenance, be sure they check the refrigerant,
proper operation of the unit, and provide any
tuning needed for best performance. Unfortunately,
this is the point where I must present a
caveat. If your system has been running well
and showing no signs of distress, be wary of
a contractor diagnosing need for immediate
replacement. Unless this is an absolutely trusted
or highly recommended firm, second opinions
are never a bad idea.
Now you can enjoy a cool summer. n
10
Cooperative Living/May 2015
Cooperative Living May 2015

Table of Contents for the Digital Edition of Cooperative Living May 2015
