10:19AM | 07/14/07
Member Since: 07/13/07
2 lifetime posts

I would like to know what the most cost efficient way is to run the airconditioning in my home. It is a 6,000 sq ft craftsman home and noo tree shade in Virginia.

Is it better to keep the ac running all the time at a constant temp. or would it be better to turn it off at night and back on later in the day when it gets hot?

Which is the most cost efficient way to run it?


11:22AM | 07/14/07
Member Since: 04/25/05
1915 lifetime posts
A large percent of the work that an AC does in a place like VA is not to cool the air, but remove the humidity.

If you turn it off then the AC has to work overtime to dry the air out again.

you can use a Set back thermostat and have it increase the setting 3 - 5 depgrees when you are not at home or at night if you like it a little warmer when you sleep.


01:14PM | 07/14/07
Member Since: 07/13/07
2 lifetime posts
Thank you,

There seem to be a lot of opinions floating around on the best way to use the ac and if it is costing to much money to keep the house air conditioned. Also, does keeping the fan on all the time help with the humidity as well? You mentioned a set back thermometer. What is that? Can't you just do it manually?


01:35PM | 07/14/07
Member Since: 04/25/05
1915 lifetime posts
A setback thermostat is one a digital one that you can program in a schedule of times when you want the tempature to change settings.

Yes, you can do the samething manually.

The advantage is that with it programmed you don't forget and you can have it change when you are there.

For example if you set the thermostat for 80 and then get home at 6 pm it and change it 75 you will live with extra heat for a while. But with a programble you can set it to change at say 5 Pm so that it is back to 75 when you get home.

It is called setback becasue is is also used during heating to setback the tempatures (to a lower setting), typically at night and during the day.

Runing the fan continously can help sometimes when you have problems with stagnet air or unbalanced tempatures.

But it actually adds a little more humidity to the air. Because any condesnation on the coils will be re-evaporated when the AC compressure shuts off.
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