Grow tent vent

alright guys, i bought a grow tent 1.2mx1.2mx2.0m got everything i need just need some ventillation i was thinking of buying a extractor fan from B&Q rigging that up in there, what do you think?

from experience dont be cheap and cut corners on ventalation for fans when using a tent. so since ur tent is 4ftX4ftX6ft i have one that size too. with a tent that size is 96 cub ft if ur having it as ur exhaust fan i would make it 200cfm or biger to make shur ur make a big enuff negitve pressure in the tent to pullin fresh air.