cold or fresh air?

From the air to going into the intake, does it need to be fresh air or can it be cold?

Reason i ask is that i am finding it difficult to get fresh air into the room by opening a window. So i was thinking of using a Air condition unit that will be on 24/7 beside the tent and using that air to be sucked in by the intake fan.


Would this be ok or does it have to be fresh air from outside?

well fresh i think is always best, butif you cant then u cant. ac will be ok but keep an eye on the humidity if your in veg, can bring it down a bit. just try to get the air that has een used so to speak out of the room, you dont want to keep recurculating stale air. if you know what i mean.

ok mate i will get a ac unit. Will watch out for low humidity too.

Without fresh air, your yield will suffer big time.