1) Do window A/C units, when set on the fan only setting, blow fresh air in
from the outside, like a regular box window fan, or recirculate air from the
inside?

2) Same question, but with the A/C turned on. Does the air come from the
outside or inside?

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

Thanks!