How long to leave extraction fan on?
My girl is 3 weeks and some odd days into flower. I recently set up my filter and fan and have left it on 24/7. Does anyone have any experience with this and could you fill me in? It has eliminated the smell so if it needs to be on 24/7 that's no problem. (Maybe a break once a week)
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"Knowledge is the one gift that cannot be taken away, for its value only grows with time."
300W full-spectrum - 2x2x4 -
My exhaust fan/filter runs all the time. It's been on high speed since it was plugged in on May 31, when the plants flipped to 12/12. I'd be afraid to turn it off even for an hour during flower. It vents used air, but it also extracts heat and humidity.
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Did you get the one with the variable speed switch? My 2x4x5, with two 5-gal plants in week 7 of flowering needs the fan running on high all the time to change all the air out in a timely fashion. You could turn it down if you are using a smaller tent.
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Right as I went to order they sold out of the bundle (with ducting) so I had to get a different model. I'll tag you in the setup post I made. It runs at one speed as far as I know but it definitely sucks the walls in -
I have a variable speed fan with carbon and run it all through flower with the carbon filter. In veg I remove the carbon filter as smells are dramatically less and run the fan as needed to help control temp and humidity.. Then I use the carbon again soon after the plants go into flower.
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My giant fan filter has been on since i got it...never turned it off or up lol. Been running on low speed since day one.. It's overkill for my size tent, but i smell nothing.Shappel S3000 3.5x6x6' ice hut
Fusion Board LED Panel 480w
6" Fusion Breath, Fan/Filter
Canna Coco/perlite
General Hydroponics Flora Series
Cal/Mag.
Scarlet Galaxy GTF
Scarlet Grapes GTF
Razzpergers x 2 GTFComment
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Thanks guys it's staying on 24/7. Definitely eliminated all odor"Knowledge is the one gift that cannot be taken away, for its value only grows with time."
300W full-spectrum - 2x2x4Comment
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@Gjourney101...I'm sure you know this but the speed controller will give you more options for setting the right fan speed for your grow space, conditions, etc. A speed controller will also let you buy a bigger fan and run it at a slower speed. You'll want negative pressure. In other words the sides of the tent need to suck in. And yes, leave the fan on 24/7 as it will exhaust stale air and bring in fresh air. That will help with temp and RH.Auto/Photo Tent: Gorilla 2x4x7'11" HLG 350R, Infinity 4" w/Carbon Filter, Coco 50/50 perlite
Autopot system: 1 Purple Haze/Malawi 100% Sativa Ace Seeds
Photo Tent: Gorilla 4x4x7'11" HLG Scorpion R, Infinity 6” w/Carbon Filter, Coco 50/50 perlite, Autopot system: 2 Purple Haze/Malawi & 2 Malawi 100% Sativa Ace seeds
Nutrients: CX Horticulture - full line for both tentsComment
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Yes the tent walls definitely suck in. By a good inch or so. I put a ripped piece of paper on the screen and it definitely sticks (since air is sucking in). I can't invest in another fan right now but the one I planned to get was a variable speed. Other than that I don't even need a clip on fan. The air being pulled in is actually blow through the entire canopy and is lowering RH. With the AC, she sits at a cool 70.4 degrees F with 43% RH. I'm liking it so far. I found out " 4 inch " filters are referring to the diameter of the tube not the length 🤣 -
I needed to know if there was suction at the bottom of the tent where air is being pulled in, so I took a small piece of ripped paper and put it up to the screen. It didn't fall when I let go so there's good suction
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