I've read numerous threads about this but can find a definitive answer. I plan on having an active exhaust with a carbon filter at about 200 cfm, my grow box would be about 72 in high x 40 in long x 30 in wide and use about 10 cfl's. I keep reading that a passive intake will work just fine but I would rather use a computer fan with a light trap to get air in. To get negative pressure would I have to use a lower cfm fan? Will negative pressure still occur if I have 1 or 2 fans circulating the air inside?
Everywhere I read people say to use passive intake but in a lot of grow boxes I see people use fans? Is using a fan for intake fine?
Everywhere I read people say to use passive intake but in a lot of grow boxes I see people use fans? Is using a fan for intake fine?