So,the exhaust fan is ok(100mm),but without a fan at the intake the smell will come out..do you think the exhaust fan will make a negative pression in the room making the job?and do you think is good to make a scrog with an automatic plant?thanks for help and sorry for this OT
your actually doing more harm by having the pc fan over the intake...it actually does the opposite of what you may think...it will allow the smell to escape anywhere and everywhere thats not air tight. by having the PC fan only in exhaust, you create negative pressure...similar to a vacuum. it "sucks" the air through the exhaust only...assuming that the exhaust is carbon filtered since smell is of concern, then you will be good to go, free of escaping air leeks/smell caused by that additional intake fan...like stated above...move that intake fan so it blows on the canopy...this will keep air circulating, strengthen your stems allowing heavier bud mass and it will help reduce the chance of bud rot!