Quick vent question?

I have a pretty large bedroom but there is no windows. If I was build a tent then vent back into the room would that be enough or does it absolutely have to vent to the outside. I have a 400w switchable and 424cfm exhuastfan/carbon filter.

How hot are you ambient temps?
I have grown in a closet in a basement without venting any air outside with a 250w and it was my heating source for the entire basement. You could get away with it venting to another part of the room, as far away as you can.

YES you can do it

I grew my b. kush in a bedroom/closet grow, And it went seriously wrong. Due to the lack of ventalation and clean air circulation to the grow room, my plant developed a powdered mildew and i had dispose of it. So unfortunately i cant answer your question, but i can say there is a mold/mildew factor involved if you dont have a propper source of ventalation. So be safe and i hope this helped.