I live in a small (600sq-ft) apartment in a building that's about two
years old. The air conditioner is a GE window-style unit that runs off
a 240-volt outlet. This time of year I can keep the apartment
comfortable if I open the windows and run the unit on fan only for
80%-90% of a day. When I do this, I also run a box fan at 2/3rds
speed in another window. The a/c unit has low and high fan speeds,
and I usually program it to turn off/on in 15-minute cycles, running at
its low speed.
I can also keep the apartment comfortable if I run the unit windows
closed with the a/c on. Then the unit runs maybe 30%-40% of the time.
When I use a/c I typically set it to 73 degrees Fahrenheit.
The average mean temp. where I live for the month of September is 70
degrees Fahrenheit if that matters.
Which of these methods would be more energy efficient?
LOL, that reminds me of one of my little stints overseas, when we had a
bank of batteries and an invertor for running our house and office
during the hours other than the 2-4 hours a night when we /might/ get
Now and again we used to shut the office down an hour or so early so we
could have a few minutes of air conditioning instead. Bliss.. only
broken by the all-too-soon "beep" of the invertor battery low warning.
On Fri, 08 Sep 2006 20:03:45 GMT, Michael Rasmussen
Turn the fuquerer OFF and it will be most efficient you cheap bastard.
If you want A/C, turn it on and stop worrying about the cost. A/C is a
luxury. If you're that cheap then turn the damn thing off.
"Simple, yet efficient".
Interesting question but you'll have to figure out the answer.
Guesstimate the wattage used by your fans at the settings you use and
multiply by the minutes in use. Ditto the A/C. Whichever is lower is
Michael Rasmussen wrote:
This looks like a perfect opportunity to try this:
sniped from web page>
(3) Look at the electric meter on the side of your house. You can save
$40 and use your electric meter to find out how much electricity
something's using at a given moment. Unfortunately, this won't tell you
how much it's using over a longer term, but hey, this method is free.
First, make sure the device you want to measure is turned off. Also,
turn your air conditioner off and unplug your refrigerator; if they
kick in while you're making your measurements, that will change the
results. Go outside with a stopwatch and measure how many seconds it
takes for the disc to spin around one time. Go back inside and turn on
the device you want to measure (or plug in the fridge if it's the
fridge you want to measure. And if you're measuring the fridge, wait
until the compressor kicks in -- i.e., it starts making noise). Don't
change anything else at all -- turning even one light on or off will
significantly change your results. Go back outside and count how many
seconds it takes for the disc to go around once now.
You could unplug the fridge then turn on the ac. Go outside and time
the wheel. Go back inside and switch to fans. Time the wheel again.
Michael Rasmussen wrote:
If you don't understand what average or mean means you should probably
not be thinking about such things. The 'average mean' temperature?????
Any time you can be comfortable using fans it is going to be more
efficient than using AC. AC acts as a dehumidifier, which means that
still air will evaporate mosture from your body, which cools you. A fan
acts to evaporate moisture from your body because it reduces pressure
over your skin. In a 600 sf space, AC makes no sense unless the
humidity gets really high.
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