Does a portable air conditioner unit need to be vented outside when using only the fan mode?

ricky

No

elhigh

If you're only using fan mode, no venting is required.

Spock (rhp)

no

Edwena

Yes

Anonymous

No. It will act just like a very weak stand fan. But putting it in fan mode will be just a waste of money. It will not do anything. You can get a regular stand fan and get more from your money.