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--

Christopher A. Young
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"tom" wrote in message
om...
Can not convince wife about two things. Just want to bring it here for
a serious judgement:

1. Use Air conditioner for home at night:
Temperature outside = 69F, Temp in home = 81F,
Air conditioner trigger set to 75F

method A. With windows being open - My way
method B. With windows being closed - Wife's way

Question: which one make house temp drop faster and which one costs
less electricity?
SM: Depends in large part on the outdoor humidity. If it is very humid out,
letting humid air in will really load down the AC unit. If it is dry out,
then open windows and window fans are far more cost effective.


2. Use AC for car in a hot summer day
Temperature outside = 80F,
Temp of a car parked in sun for one hour = very hot, don't know
exact temp

After getting into the car
Method A: open windows, drive for a moment then close the windows
and start AC. - mine
Method B: Start AC right away without opening windows. - wife's

Question: which one make car temp drop faster and which one costs
less electricity?
SM: I have no doubt that open the windows drops the temp rapidly from very
hot to outdoor temp. But in that time, you could have the AC starting to
pump out cold air (as the other fellow said). And you have humidity to be
concerned. I'd be tempted to keep the windows closed, so the AC can remove
humidity.


Thanks!

-Tom