Fan Placement Advice Wanted

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StellerKeller

Active Member
I grow a couple of plants at a time under CFLs. My temp at soil level is around 77F during the day. I have an air intake fan at ground level, sucking in air from a five inch tube. Exhaust is passive.

I know air circulation is critical. My question is, where is the best place to put a circulation fan? Should the leaves sway in the wind? More or less? Should the air travel up to down, down to up, or mostly one side of the closet to the other?
 
Nullis

Nullis

Moderator
You want a gentle breeze, not a wind tunnel. Avoid having a fan directly blowing on the plants constantly: oscillating fans are ideal. Where you put it doesn't matter so much.

Your intake/exhaust should be circulating air through the tent, the fan is just to create a breeze inside the tent.
 
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StellerKeller

Active Member
insidagain said:
Occilating fans work the best .
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D'uh!

I guess I didn't think of that because I don't have a small oscillating fan. I try using things I have around. I already have too much stuff, it's like "Hoarders, Buried Alive- Junior" around here.

But I do have an oscillating floor stand fans (16 inch blades). I now have it in my small grow area. It is as close as 12 inches from the nearest plant. Is this too close? I have it on low speed, how much is too much wind?
 
G

Glaucoma

Well-Known Member
Absolutely. Fan belongs on the exhaust, not the intake.

You want to suck all of the hot air out of the space. Fresh, cool air will be drawn in through your intake.
 
Drumfounded

Drumfounded

Well-Known Member
StellerKeller said:
D'uh!

I guess I didn't think of that because I don't have a small oscillating fan. I try using things I have around. I already have too much stuff, it's like "Hoarders, Buried Alive- Junior" around here.

But I do have an oscillating floor stand fans (16 inch blades). I now have it in my small grow area. It is as close as 12 inches from the nearest plant. Is this too close? I have it on low speed, how much is too much wind?
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Read the plants. It's hard to tell as we don't know how big they are, what stage they are in, how they are moving, or how much forced air is created by the 'low' speed. As long as they look comfortable and are simply swaying in the breeze, they should be okay. If the leaves start the get tattered or droop, it's too much.
 
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StellerKeller

Active Member
Drumfounded said:
Read the plants. It's hard to tell as we don't know how big they are, what stage they are in, how they are moving, or how much forced air is created by the 'low' speed. As long as they look comfortable and are simply swaying in the breeze, they should be okay. If the leaves start the get tattered or droop, it's too much.
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Excellent! I can do that.
 
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