Ventalation for tent ????

Hey everyone, I was wondering if anyone has any experience with a DR 100 grow tent. I have just purchased one and I am now looking to find a fan/filter combo that would be sufficient for a 3x3x6 box. Smell is a important factor for this grow so i need system that will acheive these results. I have just ordered a 400w MH/HPS combo and I need some help. Anything would be much appreciated !:mrgreen:
 
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