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Posted by Pete R on August 14, 2005, 5:05 am
>
> > Have an Amana air conditioner. Probably 7 years old. It has a vent
> > setting that can be set at either 'Closed' or 'Exhaust'. I've always kept
> > it on the 'Exhaust' setting. I would guess the Closed setting would
> > prevent air from re-circulating from outside. And, would probably keep
> > the room cooler. But, then you would have stagnant air. Is my logic off?
> > When would you choose one over other?
>
>
> Real answer: It does not matter.
>
> The vents on these things are too small to make a difference. Why do they
> have them? Marketing.
>
> When our company had to modify tooling for a part we made for a major AC
> company to accommodate a "fresh air" model I asked the engineer about it.
> His reply: "Totally useless, but the competition has it so we have to also."
Different A/C units have different size exhaust vents. You can
tell how big yours is by simply noting the change in airflow from
the unit between its closed and exhaust settings. If there's little
or no change, the exhaust vent is indeed too small and isn't
making any difference.
We have a basic Frigidaire model and there's a major difference
in how fast our apartment cools down when we leave the A/C
on exhaust for several minutes when we first turn it on.
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