670420grower
Well-Known Member
i use 6, 8 & 10" duct fans for both of my grow rooms (5'x5'x7') vegging/ (6.5'x6.5'x6.5') budding.Not sure to go with 8" or 6..anyone here using an 8" ? With a 7x7x7 Like me.
So I'll go
filter-ducting to hood -ducting to fan and ducting outside
If you want to calculate the actual cfm for your grow room, multiply your grow room size, then it will tell you how many cfm's you need. Here is a site that can help you get started.
http://www.littlegreenhouse.com/fan-calc.shtml
happy planting!