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Simply:

If it is colder outside than inside then opening the windows will give cooling to the space.

If lots of air is entering then the air conditioning system may not have much effect on temperature.

However in some cases this will not be true:

Air conditioning systems remove both heat and usually water from the air.

If the humidity in the outside air is high, the humid air entering will cause the air conditioner to use all its power on removing water from the air leaving none for removing heat.

PS

It is commonly believed that one should not open the windows, as this will result in "cooling down the entire world".

However with a limited capacity air conditioning system, this will not be a problem.

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16y ago

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