"Edwin Pawlowski" wrote in message
...

"Charlie S." wrote in message
news:KIvLe.407$I56.131@trndny06...
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."
--
Ed
http://pages.cthome.net/edhome/


This is Turtle.

To Edwin and OP Charlie ,

Years ago with a big S , I spoke to a Whirlpool Rep. as to why the Fresh air
option was on the window units. There was 2 reasons as to having it.

1] To bring in fresh air to a room from outdoors : If you staied in a small
room for 12 hours and the room was air tight. You could die from lack of oxygen
for you will breath it all up without get more fresh air in the room.

2] To bring in fresh air to a room from outdoors : In some parts of the
country where you have low humidity conditions like 15% RH all the time. the Air
conditioner will even lower this 15% RH down to maybe 5% RH or so and some
people will have real bad Nose Bleeding at this very low Humidity condition. So
they bring in fresh air in to keep the Fresh air up and some of the humidity
level up too. Now anybody in high Humidity parts of the country , it is of no
use to run the Fresh air option at all for the humidity will always stay up like
in Louisiana. Then there would only be the fresh air problem but most people
open a door to a room every 8 to 12 hours.

So in Very Low Humidity areas of the country this option may be of use but in
high humidity areas of the country. It has very little useful purpose .

TURTLE