Need Ventilation Help, Passive Intake/Active Exhaust

4204l1f3

Well-Known Member
Hey guys and gals, I am finishing up my renovations on my grow room and need some ventilation help/advice.

I posted pics to help you get what I'm explaining.

I have two grow areas in a short closet. The bigger one is for vegging, the smaller for flowering. The room isn't done yet, so bear with me.

For my vegging room, I have two pc fans on top in the rear blowing air out of the area. On the bottom of the door in the front are two holes cut for passive intake.

I will have one and one in the flowering area.

Did I do this correctly? Are the pc fans strong enough to pull air out? My temps are fluctuating a bit, and I would really like to fix that.

Any help would be most appreciated. Remember, these are areas within a closet connected to a hallway, so getting exhaust through the closet doors is impossible, other than the cracks by the hinges, etc. The pics are taken from the closet doorway.

Oh, and don't worry about the light escaping from the area other than through the intake holes. I sealed the edges after taking the pics. And the flowering area has a top now, lol.

Any help is rewarded with rep and most appreciated... Thanks again and check out my sig!
 

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MrJoshC

Well-Known Member
Its hard to say for sure because we dont know what kind of lights your using or the actual size of your grow area. But if your temps are staying within 70-90 F you should be fine. Depending on the size you might need a little more ventilation to get more fresh air in.

Also, I've seen varying numbers, but most people think that you should replace the air in your entire grow setup between 1-5 times per minute.
 

DubRules

Well-Known Member
i use pc fans with great success. turn on your lights and fans and monitor the temperatures. this is the only way to tell how they will work.
 

Trunk5

Well-Known Member
lol check out my box, i actuly need to put in a few updated pictures, ive replaced my 4 inch with all 6 inch venting and all 120mm cpu fans, 2 120's to cool the light hood, one to draw air out of the box its self, one drawing air from my veg/flower chamber, to the top where i have the cfl's to start seeds/maintain clones and such.. and for my intake i have 3 80mm's mounted to 3 sides of a box attatched to my 6 inch intake hmm maybe ill add pics for you real fast hehe.
 
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