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Beachcomber
 
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See the above answer.

Because I have my window A/C set to fan only, and even though it was
freezing outside, it was blowing warm air!


Then guess what? Yours was recirculating indoor air.


Thanks!



Basic Principal of Economics Here

All air-conditioners are designed to re-circulate the indoor air. In
addition to cooling the air, the second, but equally as important job
of an air conditioner is to de-humidify the inside air. If they just
sucked in 100% outside air, the cost to cool and de-humidify that
volume of air would be incredible.

The little fresh air vent that has been described on most A/Cs is just
that... A way to provide a little bit of fresh air from the outside
without excessive expense.

Lack of fresh air is why some people feel sick in an air-conditioned
space. Your breathing the same CO2 and other byproducts of human
respiration over-and-over. If not enough humidity is taken out of the
air, you will feel cold and clammy.

Beachcomber