planespotting
Posts: 3026
Joined: Sat Apr 17, 2004 4:54 am

Central Air Question

Thu Jul 20, 2006 7:26 am

Hey folks,

I have a small question regarding your use of central air conditioning. How many of you not only close the interior part of your window (the large bulky part that is fairly easy to move up or down...not sure of the technical term), but also the storm window part of the assembly?

My parents never closed the storm upon turning on the air conditioning, so of course I don't either. However, my roommate Andy apparently thinks this is a hard and stead-fast rule about air conditioning a house, and expressed his feelings in a fairly angry fashion -- Basically I said that "i don't think it matters that much" and he was like "NO, don't you fucking say that, it matters A TON" or something like that.

Anyway, am I crazy for not closing the storm windows when I turn on the a/c, is he crazy for thinking it matters so much, or (the more plausible idea) are he and I both retarded and just getting frustrated because ready to move out of this house (in 12 days!) and into our own apartments.

haha.
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Bobster2
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RE: Central Air Question

Thu Jul 20, 2006 7:30 am

There's an interesting device called a "thermometer". You could try something called an "experiment".  Smile  Smile
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
VSlover
Posts: 1860
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RE: Central Air Question

Thu Jul 20, 2006 7:42 am

the termometer wouldnt work because the premise of central a/c is that the temperature inside the house stays consistent, as gauged by the thermostat.

what he would need to do would be to examine the energy drawn by the a/c unit with the windows up and then again with the windows down. however to get sufficient results, atmospheric conditions would have to be identical on both days the test would be run.

in essence, unless you have windows from decades ago, excess energy used in running the a/c will be negligible.
 
planespotting
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RE: Central Air Question

Thu Jul 20, 2006 7:43 am

i think he's more concerned about energy costs...
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Bobster2
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RE: Central Air Question

Thu Jul 20, 2006 7:47 am

Quoting VSLover (Reply 2):
the termometer wouldnt work because the premise of central a/c is that the temperature inside the house stays consistent

It would work. If heat is leaking through the window when the storm window is up, the temperature near the window will go up. Then the temperature near the window will go down when the storm window is closed. Repeat several times, see the temperature go up and down.

Quoting VSLover (Reply 2):
atmospheric conditions would have to be identical on both days the test would be run.

You think this will work and the thermometer won't? I disagree. How do you get the same atmospheric conditions on two days? The wind would have to be the same, the clouds would have to be the same, atmospheric haze would have to be the same, and of course the temperatures would have to be the same.
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
Bobster2
Posts: 1523
Joined: Mon Jan 17, 2005 3:04 am

RE: Central Air Question

Thu Jul 20, 2006 7:54 am

Quoting Planespotting (Reply 3):
i think he's more concerned about energy costs...

Elementary thermodynamics.  

OK, at this point I'm in over my head. Help.

But you should be able to calculate how much heat is flowing through the window and the extra energy it takes to compensate for the added heat. I can't, but maybe somebody can.  

If you do the thermometer experiment and find little difference, you can forget about the calculations. That's what I'm hoping will happen.

[Edited 2006-07-20 00:58:21]
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
planespotting
Posts: 3026
Joined: Sat Apr 17, 2004 4:54 am

RE: Central Air Question

Thu Jul 20, 2006 7:58 am

guys...i just want to know if you close the storm window or not.

i dont' really care whether or not it makes much of a difference or not...i'm pretty sure the difference would amount to a few dollars per month at the most in the energy bill...
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Bobster2
Posts: 1523
Joined: Mon Jan 17, 2005 3:04 am

RE: Central Air Question

Thu Jul 20, 2006 8:04 am

Quoting Planespotting (Reply 6):
...i just want to know if you close the storm window or not

YES. Of course. A double window provides better insulation. Better insulation is good. Even if doesn't make a big difference, use all the insulation you have available. Why argue about it?
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
sccutler
Posts: 5568
Joined: Thu Jan 27, 2000 12:16 pm

RE: Central Air Question

Thu Jul 20, 2006 8:05 am

First of all, from down here in A/C Country (104 f outside now!), we don't even use storm windows.

But I can also tell you this: storm windows are effective at reducing thermal transfer through a window, in either direction, so they should certainly be beneficial during the warm weather months, as well as the cold ones.
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bill142
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RE: Central Air Question

Thu Jul 20, 2006 8:13 am

It depends on the system. We use an evaporative system which requires the windows to be opened to create a flow of air. My sisters system is a refrigerant based system and it requires the windows and doors to be closed otherwise the system will be overworked.

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