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#1
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Optimal setting for 2 A/C unit in two story house
Hi I have a two storey house with two separate A/C units: one for each
floor. I have a normal work schedule during the week 8 to 5. When I get home I typically stay down stairs until about 11:30 pm before I go upstairs to bed. My prefered temperature here in tampa is 76 degrees I am thinking about programing my ac, to do the followirng 1) increase the temp for upstairs and downstairs to 80 during the day when I am not at home 2) at 5 pm lower the temp downstairs to 76 for my enjoyment downstairs while leaving upstairs at 80 3) at 11:30pm increase downstairs to 80 and lower upstairs to 76 while I sleep 4) at 8am the following morning increase upstairs to 80 and maintain down stairs at 80while I go to work Repeat this every day of the week. Is this recommended? the builder of the house suggested that I should always keep both units within one temperature degree of each other. However this makes more sense to me. Your comments would be appreciated. thanks jasguild |
#2
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Optimal setting for 2 A/C unit in two story house
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#3
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Optimal setting for 2 A/C unit in two story house
Thanks for all your response. One thing I probably did not elaborate
on is what exactly l am trying to accomplish. My goal is to lower my electric bill without adding any excessive wear and tear or strain on my equipment. Humidity is not really an important factor to me. With that goal in mind, do your opniions change?? jasguild |
#4
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Optimal setting for 2 A/C unit in two story house
Humidity is not really an important factor to me.
With that goal in mind, do your opniions change?? jasguild Not at all, that is my original goal, but the reduced humidity is icing on the cake. Keep in mind that a humid space at 75 degrees may "feel" warmer than a dry space at 80. |
#5
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Optimal setting for 2 A/C unit in two story house
That's pretty much what I do, only more so. I have a setback thermostat upstairs that is set to 90 between 9 am and 9 pm, and 73 between 9pm and 9am. I find that this works well, as the long cool down cycle really dehumidifies the upstairs, it really doesn't do it at once, since the thermostat is a "smart" one and it calculates how well it did at achieving its goal and adjusts the next days attempt to start earlier or later. The downstairs one I completely shut off at night and manually start in the morning. We are home all day, so it isn't exactly your scenario, but I see no real reason to keep them all that close in temperature, a little cold or hot probably transfers between the two, but it isn't all that noticeable, and I can't see how it could adversely effect the equipment. |
#6
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Optimal setting for 2 A/C unit in two story house
If humidity control is important to you than you might want to only have one
unit operating at a time (unless it's a VERY hot day). Use the scheme you outline but make the set back temperature of the "other unit" high enough that it usually doesn't come on at all when in "set back" mode. This will may be non set back unit operate almost continuously which helps control humidity. You might pick a set back temperature of up to 85. This isn't super uncomfortable if you have to go into the hot zone to get something. You will have to experiment to see how long it will take to bring that zone down to 76F while the downstairs unit is also on. The goal is that you shut down the downstairs A/C just before the upstairs is cooled to 76F. |
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