Would a 4" inline Vortex rated at 172 cfm actually be better than my 6" inline duct booster fan from Lowes which is rated at 240cfm? I've read a few places that a duct booster fan has no pressure so even though it's rated higher it's effectiveness is cut up to 75% when you get the carbon filter/ducting hooked up. I have 484 watts of cfls, so heat builds up pretty quickly. I had been trying passive intake and thought that was the problem, so I added a 100cfm intake fan and now I have positive pressure in my tent. So far my temps are hovering at 82 degrees w/lights on, which I'm fine with, but positive pressure = smells, so what the hell is it going to take?
Here are my calculations:
I have a DR60 grow tent 2' x 2' x 4.6' so that's only 18.4 cubic feet. I need to exchange air once every 3 minutes, so that would mean I'd need a fan rated at a mere 55 cfm.
Add 20% for a carbon filter so now I'm at 66 cfm
There are a few bends in my duct work (unavoidable) but I can feel a good amount of airflow being exhausted by my Lowes fan which is pulling air through the carbon filter. I'm shocked this is not working honestly.
So should I get the vortex rated at the lower 172 cfm? Will this give me negative pressure w/my intake fan AND keep air exchanged enough to keep temps down?
Here are my calculations:
I have a DR60 grow tent 2' x 2' x 4.6' so that's only 18.4 cubic feet. I need to exchange air once every 3 minutes, so that would mean I'd need a fan rated at a mere 55 cfm.
Add 20% for a carbon filter so now I'm at 66 cfm
There are a few bends in my duct work (unavoidable) but I can feel a good amount of airflow being exhausted by my Lowes fan which is pulling air through the carbon filter. I'm shocked this is not working honestly.
So should I get the vortex rated at the lower 172 cfm? Will this give me negative pressure w/my intake fan AND keep air exchanged enough to keep temps down?