How many passive intakes?

cdd10

Well-Known Member

Aug 3, 2014

• #1

So I have a 3.5x4.25x8" closet with a 400w and 381 6" can. Will these two 6" holes be enough passive intake or you think I'll need a third? I know duct has bends in it but certain circumstances made me do it like that.

 

SnapsProvolone

Well-Known Member

Aug 3, 2014

• #2

Intake area should be 2 - 3x the area of active exhaust duct.

 

SnapsProvolone

Well-Known Member

Aug 3, 2014

• #3

You'll be finding yellow fiberglass insulation "hairs" in your nug.

 

Red1966

Well-Known Member

Aug 3, 2014

• #4

Should be enough. Run the light and see how warm it gets in there. Then you'll know for sure. I don't see a filter. You'll need one if you're not legal.

 

cdd10

Well-Known Member

Aug 3, 2014

• #5

I'm working on getting that fixed right now I just got that put up lol do you think that's enough passive intakes?

 

cdd10

Well-Known Member

Aug 3, 2014

• #6

I have one just not put up, and it's like 76° in there I didn't know if I drilled one more for more fresh air if that would be overkill..

Red1966 said:

Should be enough. Run the light and see how warm it gets in there. Then you'll know for sure. I don't see a filter. You'll need one if you're not legal.

Click to expand...

 

SnapsProvolone

Well-Known Member

Aug 3, 2014

• #7

As long as light leaks aren't an issue, your passive intake can be as great as the equivalent of the surface area of your box.

 

ILM

Well-Known Member

Aug 3, 2014

• #8

After you install your filter it will restrict the pull from your fan.
I'd throw it all up then check temp
If it holds steady where you want it youll have your answer
Jmo fwiw

 

Red1966

Well-Known Member

Aug 3, 2014

• #9

^^^^What he said^^^^^

 

ILM

Well-Known Member

Aug 3, 2014

• #10

Good luck with your future crop brother
Your set up looks tight

 

cdd10

Well-Known Member

Aug 3, 2014

• #11

ILM said:

Good luck with your future crop brother
Your set up looks tight

Click to expand...

Really?? Thanks man! Hope all turns out well grew in a tent last time. Didn't really dig a tent

 

E

eLinc420

Member

Aug 3, 2014

• #12

If your able to you should consider some passive intakes on the floor to allow cool air to rise up past the plants then exiting your exhaust system. I use a 9in. Metal high velocity fan mounted ontop and 6 3in. Passive intakes on the floor that work great. If you have any old cpu fans they work great as powered intake fans.