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Ventilation Help Por Favor!

righto111

New member
I am wondering best way to ventilate a small 2x3x4 grow box. Also should I get a 400 or 600w for the space? Here is the setup. Box stays in my room - no ventilation from the box outside the room, room temperature = 67 degrees and box stays about 79 now with a 150w. I have my intake fan (105cfm 4.5inch axial dayton) blowing directly outside the box onto the plants and my outtake at the top of the box blowing all the excess air out (105 cfm 4.5 dayton fan). I am thinking of whats the best way to cool such a high powered light (cool tube will definitely be in the plans).

I am pondering a couple of ideas:
1) buy 2 more 105 cfms and have 2 exhaust, and 2 intake instead of 1:1
2) get a 6" inline fan (about 300cfms) and have it running exhaust, my 4.5 inch fan running through the 400-600 watt outside the box, or have the 6" inline running through the 400-600 watt and the 4.5 exhaust (still having an 105cfm fan bringing in air)

Questions: would having exhaust way* way* more than intake be a bad thing? if so... why? thanks :)
 

righto111

New member
https://www.icmag.com/gallery/data/500/VENTEDSCRUB.JPG
VENTEDSCRUB.JPG

nvm think i found my solution :p. I was under the impression a fan hat to go on the intake side of the cool tube to pull air into it, but i see that an inline can pull air out of both the grow setup and the light at the same time. cheers.

last questions: for my small box - 400 or 600? :p
 

MHHSP

Member
400 its...2ftx3ft=6sq ft 400 watts/6 sq ft= 67 watts/sq foot perfect amount of light and will be easier to cool than a 600. you got the right idea.
 

righto111

New member
400 its...2ftx3ft=6sq ft 400 watts/6 sq ft= 67 watts/sq foot perfect amount of light and will be easier to cool than a 600. you got the right idea.
your awesome, thanks!
smile.gif
-400 i shall be

I don't know how that happened, here's the goods on ventilation --

https://www.icmag.com/ic/showthread.php?t=112862&highlight=ventilation+101

And I vote 400 in that space.

Yes, thanks! and I was more/less already leaning 95% towards the 400w. That's a handy thread - keeping it :p
 
https://www.icmag.com/gallery/data/500/VENTEDSCRUB.JPG
VENTEDSCRUB.JPG

nvm think i found my solution :p. I was under the impression a fan hat to go on the intake side of the cool tube to pull air into it, but i see that an inline can pull air out of both the grow setup and the light at the same time. cheers.

last questions: for my small box - 400 or 600? :p

Beware of pulling HOT air from a cooltube - I've heard horror stories of fan blades being cooked. It's always best to blow through the tube.

Put it another way, when it's your birthday and the cake comes out, candles a blazin', do you suck or blow them out?
 

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