need help with intake and exhaust CFMs

good evening RIU.

i am currently setting up a flowering room which is 4x4x(8 tall).

should the intake and exhaust CFM be matched exactly or is it better to have one fan exceed the air movement of the other?

there is no a/c in my grow room so i will have to intake air through the wall from the room next door

I couldent see why not? is your tent air tight? put a damper on your intake from ur room and put your 1 fan on your exhaust. If u have a total air lock the damper should open and suck in air from inside. Try going overkill on your cfm's compared to ur layout.