Do you think a 4 Inch 203 CFM Inline Fan with carb...

Hello! Instead of giving you a hard answer I'll post this link that will help you calculate the required CFM you will need to properly exchange your grow tents air flow: https://bigbudsmag.com/calculating-cfm-exhaust-fan-marijuana-grow-room/ I will say that the 203 is more the adequate for that space, but check the calculator just in case👍. On a personal note, I personally over sized my intake and outtake and bought two variable motor speed controllers (pretty cheap. 15-20 bucks each) to lower the speed. If and when I expand I won't have to buy another inline or outtake, I just need to turn them up👍. If you think you might be expanding soon, maybe consider over sizing your unit as well so it can handle a larger space if you need it to. Cheers and good luck with the calculations!