Is it necessary to have air from the outside blowing into a closet with a 4 exhaust fan?

Discussion in 'First Time Marijuana Growers' started by Mothasucka, Oct 21, 2014.

  1. I wanna grow in my closet with a 4" carbon filter fan but do i need fresh air blowing in? i will be having the air that is being sucked in from the fan will be going outside the closet, is that god enough or should i have air being pumped in?? 


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