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When you leave the AC on, it has to work harder to keep the house cool
(versus keep the house warm). This uses more electricity.
However, if the recovery time is very long, it might be more important
to keep cool, compared to the energy saving. Since you describe it
"struggling", I would leave it on. I would also call a HVAC company to clean
and service the unit. Might be running very inefficently.
--
Christopher A. Young
You cannot shout down a troll.
You have to starve them.
.
"Walter Cohen" <w_cohen@hotmail.com> wrote in message
news:bBVug.58$MU1.23@fe11.lga...
Hello.
I live in NY.
I'm wondering if it is better to leave a central a/c unit running
during
the day when no one is home, either at the normal temperature or at a
few
degrees warmer -or- use a set-back thermometer when leaving for work
in the
morning and have the A/C unit start up again an hour or 2 before
coming home
later in the afternoon?
I use a set-back thermometer and it takes my unit 3 hours of
continuous
operation to bring the temperature down 8 degrees.
Some people have told me that it makes more sense, energy wise and
cost
wise, to not set the thermostat warmer in the morning and have the
unit
struggle for hours on end in the afternoon trying to get back to the
original comfortable temperature. Instead they say to leave the A/C
on as
it would probably cost the same if not less to periodically cool an
already
cool house instead of cooling a house that isn't cool at all.
Con Edison says to turn off the A/C when no one is home but I think
they
refer to window units (as they also say to turn the AC back on again
via
auto-timer a half hour before returning - a half hour would do nothing
for
me)
Thoughts?
Thanks,
Walter
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Re: Central A/C - leave running or use set-back thermometer?
