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Ventilation FAQ


 

#1
Bohbo

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Edited by Bohbo, 19 July 2010 - 01:34 AM.

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#2
Bohbo

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#3
The F0X

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This FAQ answered every question I could even think to ask as a newbie to the indoor scene. And I am definitely going to be reading that DIY smell masker when my ladies start stinking. Thank you quite alot, good sir!

#4
Bohbo

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#5
The F0X

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Touche, my friend. But, like you said, I do not live within shouting distance of anyone. I could hoot and holler and stink a mile in radius and no one would know.

#6
The F0X

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Those fans that you mentioned were slightly out of my price range. Would one such as this 6" In-Line Duct Fan be acceptable, until i can afford a better one? CFM of 160, free air and boosted.

#7
AGGrower

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Thanks for the info

#8
Ramones1234

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To the OP, I run a 6'' 540cfm through 1600 watts and exhaust from that is a constant 75f (drawing air at 70f room temp) and I have no doubt that the temp would rise only a tiny bit if I were running 2 1000 watters. My conclusion is that to be safe 250/300cfm per 1000 is optimum.


Those fans that you mentioned were slightly out of my price range. Would one such as this 6" In-Line Duct Fan be acceptable, until i can afford a better one? CFM of 160, free air and boosted.


These will move maybe half the CFM rated. Only in an emergency.

Edited by Ramones1234, 04 May 2010 - 06:25 AM.


#9
AGGrower

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How would I go about putting an intake in to my room. Where would I put it?

#10
The F0X

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Thank you, ramones!

A question to anyone willing to answer: I'm looking for the cheapest viable intake or centrifugal fan for a 4'x4'x6.5', 500W grow room(200 ish cfm, i suppose?). Any ideas or opinions on cheaper ones? I'm not really concerned about the sound factor. power usage is a priority, but not as much as price is.

One thing I do NOT want is my plants to have heat stress. Right now i have some personal fans, one at the door of my grow tent blowing outside air in and one behind the plants circulating the air that comes in. My temperature keeps at a constant 83, but I need a real exhaust fan for legitimate growing purposes of course.

#11
Ramones1234

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Thank you, ramones!

A question to anyone willing to answer: I'm looking for the cheapest viable intake or centrifugal fan for a 4'x4'x6.5', 500W grow room(200 ish cfm, i suppose?). Any ideas or opinions on cheaper ones? I'm not really concerned about the sound factor. power usage is a priority, but not as much as price is.

One thing I do NOT want is my plants to have heat stress. Right now i have some personal fans, one at the door of my grow tent blowing outside air in and one behind the plants circulating the air that comes in. My temperature keeps at a constant 83, but I need a real exhaust fan for legitimate growing purposes of course.


Ebay always has some fair deals, personally I would go bigger than needed and get a speed controller. Its easier to go big and not need it than to try to get a deal only to make you spend more than you would have fixing a problem than by getting the right tool for the right job.
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#12
FullmoonCat

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I'm looking at getting this fan for a 2' x 4' x 5.5' wooden grow cabinet, running a 400 watt HPS. Do you think it would do the trick? -

High Tech Garden Supply

Alternatively, I thought about making my own vent fan out of a 7" fan I already have, but with material cost it might be almost as much, and would be way bigger. Space is obviously an issue in grow cabinets.

#13
Bohbo

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#14
FullmoonCat

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Awesome, thanks! +rep to you, good sir :)

#15
G@nja

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using 4+ pc fans for a 2x3x4-5 (ish) box with a 400w hps

which would be the most efficient method of putting them in?
i was thinking 1 intake at the bottom then 3 at the top pushing?pulling? air out

do pc fans pull into a box or push? and do they pull or push when they eject the hot air??:confused:

#16
Bohbo

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Edited by Bohbo, 04 May 2010 - 07:30 PM.


#17
G@nja

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thanks alot for the fast reply.:D
Do you think having 6 pc fans will be sufficient to keep the temperature ,from a 400w hps low bay with an inbuilt ballast, ok for the plants? and would u reccomend having one intake fan with holes or just holes?:confused:

#18
Bohbo

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#19
G@nja

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will do thanks again for the fast reply
so essentially if its tooo hot i can just stick in more PC fans or is there a limit to how many will be efficiet
so what i mean is 1 fan =10cfm or summin then 3= 30 then 4=39 then 6=50 or such a trend
:confused:

My last question btw (i think)

#20
Bohbo

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