Deep Suction how hard should my fan blow??

I just found my seldom used fan speed controller, because my new tent is a good Spider Farmer (Zipper is incredible) -it's air tight.

Is there a point to have any more than the minimum speed required to start sucking in the walls? If there is any vaccum, no smell can escape can it? Or for heat, more might cool more or why waste any extra power or fan life?


Nice title huh, that's why you stopped here...

tommyinajar said:

I just found my seldom used fan speed controller, because my new tent is a good Spider Farmer (Zipper is incredible) -it's air tight.

Is there a point to have any more than the minimum speed required to start sucking in the walls? If there is any vaccum, no smell can escape can it? Or for heat, more might cool more or why waste any extra power or fan life?


Nice title huh, that's why you stopped here...

Click to expand...

Need a carbon filter to scrub the odor. If walls sucked in is undesirable, you can add a powered intake fan + ducting. You can flow air into the tent just as fast as it’s sucked out. Makes for some awesome air flowing inside. The walls dance

You should exchange all air in the tent every 2 minutes

Do math for cubic feet of tent. Get a fan that moves twice that. Put a filter on it and your in the ballpark

Minimum you want is 1 full air exchange per minute, you may need more exchange depending on heat/humidity but if those are in check you don’t need to run it any faster. Mines set at max(comes out to 4 exchange/min), but I’m in late-mid flower with 75 gallons of soil in that tent.

No carbon filter, shooting out the roof. 3rd story

Is there a site that explains how much vacuum one should have, that's not a shill post for a fan company?

tommyinajar said:

No carbon filter, shooting out the roof. 3rd story

Is there a site that explains how much vacuum one should have, that's not a shill post for a fan company?

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Just calculate cubic feet of grow area and you should find a CFM spec for your fan. I don't use carbon either cause I'm in a legal state and I like love the odor! I use a little 4" computer fan that is supposed to run on 12V DC, but I turned it down to about about 5V via circuit-board magic, quite slow. It's mounted on the top of the tent and blows straight up to an attic. That's my exhaust system, no intake fan. Seems to work fine.

tommyinajar said:

I just found my seldom used fan speed controller, because my new tent is a good Spider Farmer (Zipper is incredible) -it's air tight.

Is there a point to have any more than the minimum speed required to start sucking in the walls? If there is any vaccum, no smell can escape can it? Or for heat, more might cool more or why waste any extra power or fan life?


Nice title huh, that's why you stopped here...

Click to expand...

You need to rename the title though. Just change "my fan" to "she".

If you're running it through a longer distance of ducting, then you need a more powerful fan. Pretty sure that's part of how it works.

simpleleaf said:

If you're running it through a longer distance of ducting, then you need a more powerful fan. Pretty sure that's part of how it works.

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More static pressure.