Correct 'CFM' ?? urgent help needed

UK1nation

Member
hello all,

I have built my own grow tent which will have just a small HPS 70watt (Son-T-plus) inside,

TENT= 4.1ft X 2.2ft X 1.6ft (HxWxD)
Intake & Vent = 4" pipe
Intake Fan = 3.5" (92mm) PC fan '35 CFM'
Vent Fan= 5" (120mm) PC fan '76.6 CFM'

Volume area = 14.43 cubic feet.

Are the PC fans enough for my tent?
a toilet fan of 99 m3/hr
is what i wanted..but if im right i believe this is too forcefull for my needs...or not?






or is the calculation in the following picture wrong??


h
 

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