I'm constructing a new grow box(3x3x4) and wanted to know if it is better to use passive vents with a exhaust system and create a vaccum, or use active (fan assisted) intakes along with the exhaust?
I only have a 4inch 170cfm inline duct fan for exhaust pulling though a filter and hood I can add a couple of 4inch cpu fans (60cfm) at the bottom blowing air in, or just cut vents for fresh air. What do you experienced people do?
I only have a 4inch 170cfm inline duct fan for exhaust pulling though a filter and hood I can add a couple of 4inch cpu fans (60cfm) at the bottom blowing air in, or just cut vents for fresh air. What do you experienced people do?