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?