What ext. fans do i need for....

...a 2'6'' x 2'6'' x 4' tent with a 400w hps (remote ballast) and a 12'' osc fan, will want a carbon filter adding too.

could do with knowing the m3/h calculations if anyone has them?

a small 4" or 5" filter and fan will be plenty for that size space

google m3 of your room then fan it to suite, i'm crap at maths

0.6 x 0.6 x 1.2