extractor kits

[wambam123]

can anybody reccommend any good extractor kits? would i be right if i said that to a 400w hps light i would need a 100mm extractor kit?

 

[FastForward]

All depends on the amount of space you're in - check out the ventilation calculator in the section for more detail.

EDIT: I'm using RUCK fans - a 6" and a 4" for a 1.2m tent