At What Temp Do You Set Your AC?

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launderess

launderess

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Well summer finally arrived this weekend to NYC. Nothing really bad just mid to high 70's with lots of humidity. Perfect chance to fire up the new Friedrich AC and put it throught it's paces.

This is our first AC with electronic controls and despite initial misgivings am finding one rather likes the system.

Usually set the AC at either 70F or 75F using the "Money Saver" and "Smart Fan" options. This seems to give perfect results.
 
26°C

anything lower than that and our bills will sky-rocket, plus when there are 40°C outside there is plenty of cooling at that temperature.

A/C is already on and will be turned off in October.

The machine that serves the night-part of the house is a DeLonghi three split smart inverter so once the temperature is set, everything is decided by the main unit (speed, cooling capacity, filter cleaning, etc.)
In the day-part of the house there are separate el-cheapo split machines for each room and those are turned on and off according to our presence there.
 
Early  summer heat.   I think it was 91F Sunday and I have the AC on.

 

For AC I have two temp settings:

 

From  8 AM to 9 PM it is set at 78F.  If I get too hot I start taking clothes off.  From 9 PM to 8 AM the next morning it is set to 76F which lets me sleep a bit cooler.

 

What operational differences occur when using Money saver and smart fan?
 
We have central A/C and keep it set at 76 to 78 and run the ceiling fans and small fans to stir the air around.  Temp got up to 92 here yesterday.  We have found that keeping the same tgem in the house is better that letting it go up during th day and then backdown.  With our heat have it go lower during the day while at work then back up before we arrive back home.  Gas heat and electric cooling.
 
My name is Frigilux and I'm an air-conditioning addict. I keep the central air system at 72-73 degrees in the summer. I try to make up for this profligate behavior by keeping the house at 64 degrees all winter (natural gas forced air heating). I hate, hate, hate heat and humidity; we have plenty of both in southern Minnesota.
 
Jerrod06 & I cut from the same cloth with differences

For AC I have three temp settings:



From 8 AM to 5 PM (work day) it is set at 86. From 5p to 10 p it is set at 78F. If I get too hot I start taking clothes off if they aren't off already. From 10 PM to 8 AM the next morning it is set to 74F which lets me sleep a bit cooler.
 
Solid 70 Here

I keep my AC on 70 during the warm months. We had a programmable thermostat on my last ac unit and that is what drove it to an early grave. So no more of that nonsense for me.

Malcolm
 
I'm with Eugene on this one, only difference being that we set our thermostat @ 68-70 degrees daytime in winter, and 63 degrees when we go to bed.  A/C is set @ 72-73 degrees.
 
While sleeping during the day from mid shift-72-75 degrees.Otherwise thermostat set at 80.When it gets really hot-over 90 outside-don't set the thermostat no more than 20 degrees lower than outside.Residentual systems won't cool lower than that-without excessive energy use-and hard on the unit.so if it goes to 100 degrees outside-set the thermostat to 80.I am not a heat fan either-just use a portable heater in winter.My AC is terrible "heater" the heat pump mode of my Lennox isn't very good.
 
Friedrich Window Unit Here.

Set at 70 degrees during the day with "Money Saver" on, (Money Saver turns the Fan On and Off with the Compressor)

At Night, 68 degrees with constant fan. Easier to fall asleep with the constant noise of the fan than hearing the entire unit cycle on and off.

68 is preffered after working behind the line in the kitchen where the temperature can be in access of 100 + during July and August.
 
 
Thus far 78°F daytime, usually 76°F night. When the real summer heat hits, daytime goes up to 80°F or 81°F and night 77°F or 78°F (one end of the house runs about 2°F cooler due to fewer windows & slightly stronger airflow). Last bill was already $154 for 29 days 3/28 thru 4/25.
 
In the winter we have the heat set at 72F.

In the summer we have had it at 77 or 78. This new American Standard Central unit is really COLD! On our old system we had it set at 74 for best results. If we set this new system to that we would have icicles hanging in the house! And the thermostat is not off either. Single thermometers in the house indicate that 77 is really 77. I don't know what the air seems so colder than the old unit?
 
I have a Frigidaire window unit thats probably 25 years old but still works fine for the bedroom. Although there are not alot of hot humid days here, I have to have it on to sleep when its sticky. It is turned on in the evening on high, max cool and when its time to go to sleep, switched to low and the compressor cycles as needed. It is not very efficient, as I notice a spike in the power bill. But with what little it is used, it serves the purpose. At the rate our weather is going this year, I may not even have to install it.
 
AC is set at 74 once I turn it on...and I leave it on day and night. Electric budget is $107 year round. My house has no attic, as it has a flat roof (mid 20th century modern), and hard to cool, but we have very humid summers here in Charleston (WV). I try to compensate in the winter by not setting the thermostat above 66. I don't like winter heat anyway, even with a humidifier. Gas budget for heat, cooking and water heating is $94 year round, so I guess compared to some other areas, my heating/cooling expenses are not that high. I do turn the heat down during the day when I'm at work, and at night, but leave the AC at a constant setting. (just as a sidenote.....we have already had a week of 90+ days...supposed to break with a storm tonight and be back to what May should be....). I guess I should also say that my heat/ac is a forced air gas system with a waterfall humidifier and the AC is a Heil unit, using the same duct work as the furnace. House was originally built with a floor furnace and ONE window unit.[this post was last edited: 5/29/2012-15:22]
 
When I lived in San Jose we kept the temp set at 72. Heaven forbid I would do that here in the Desert. This house has 2 central systems (some homes here have 4 or more) and I keep them at a comfortable 76 which is a big difference when the outside temperature is 110+. I have a separate thermostat for system #2 in my bedroom which I used to set at 74/75 when I "entertained" in there...it hasn't been set that low in years! Old age can be so cruel.
 
Sunday got up to 92, and yesterday was 95, so turned on the AC the night before last. House was just too hot & humid to sleep, so got up about 3am to turn it on.

The Kenmore window unit here in the "hateful hovel" is presently set at 74. It's in the living room, so I must set it lower to get the bedroom to a comfortable temp. The thermometer in the B.R. is reading 78 at this time. Upstairs where bathroom is, is probably at least 10 degrees hotter at any given time.

Even with a dehumidifier in the basement, this house tends to be damp. I run the AC as much to dehumidify as to cool. The basement is leaky, and floor and walls are almost always wet, unless no rain for at least a month.
 
Wierd Thermostat On Mine

I live in a nine-story apartment building (4th floor here). When I started to read the comments on this topic, I got up and adjusted my thermostat to 72. It's now 73 in here and the a/c is off. It won't come on until it gets to 75, and then will cool down to 74-73. I still can't understand why it does this. But, I do the same thing as Appnut and try to wear as little as possible.

Our building is "controlled" (meaning I don't have the "luxury" to switch it to a/c or heater during Fall or Spring if either one is needed). Heat is usually turned on during mid-Ocotber, and a/c around early May (however, it was turned on earlier this year due to our mild Winter and warmer temps in late March, early April).

A friend of a friend lives in a house towards the central area of town, and refuses to touch his thermostat until the temp gets to 90 inside. At that point, he'll turn the thermostat to a teeth chattering 87. And although he keeps his windows open when it's 100+ outside, he swears that now and again he can feel a "cool breeze" cooling the place off (rolls eyes).
 

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