Is this fan ok?

Hey,

I'm gonna be buying a small tent soon,

3ft x 3ft, 5'3ft high.

Would a 4 inch extractor fan be enough for this?
It moves 160 mtrs cubes per hour.
(will probably be running a 400watt hps
http://www.greenspirit-hydroponics.com/4-inch-prima-klima-hobby-filter-kit
Thanks.

Cubed*. Bump.