cfm ratio

Hello Friends,
How often should the air in an enclosed grow space be recycled under optimal conditions?

all u need is a fan.u dont need to go into the pricey shit to grow the same as ur "neighbor" who is broke and can grow the best.

understand.u just need a fan thats all.

u could try an ozone generator with the intake in the grow room and the exaust facing away,like in ur room.