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Back to Grow Questions
fan from bottom
koronkonko
started grow question 6y ago
Hi! is it a good idea to blow fan from bottom to plants? Of course i have a fan with carbon filter on top of the box.
Solved
Setup. Ventilation
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Louder
answered grow question 6y ago
I run one that blows over the top of the soil and another over the canopy. Don't see an issue with what you're doing
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Similar Grow Questions
Solved
VeggieTales
Help cooling grow tent 4x4
Please experienced growers I need advice. I’m runnning a 4x4 grow tent and the temp is constantly 84-87 degrees. How do I lower temp. I have a 190cfm exhaust and 100cfm intake, 2 fans, and a humidifier. Im growing exhausted and frustrated trying to get the temp down.😅please help
Setup. Ventilation
Setup. Other
6y ago
3
5
Solved
69XINEYESEEKAYX69
Subterranean fans on 24/7 Y or N?
Was wanting everyone's thoughts on fans on the ground of my tent being on constantly, I want to try an keep airflow as well as make the stems stronger from the movement but always end up getting leaves that get wind damage. Luckily most tends to be where lolipopping will be.
Setup. Ventilation
4y ago
4
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Solved
DutchGrownGreens
How to make it airtight?
I am going to grow in a closet next round, the only thing im not sure on is how to make the doors airtight when closed.. thinking about some foam isolation strips. Any input is appreciated🙏
Other. General questions
Setup. Ventilation
4y ago
3
2
Solved
Just_Weed
Do you think this is a better position for carbon filter so it can have better airflow or is it more important to scrub air from the top and have 2 90 degree bends? I'll probably try this in my next grow. Pic with drying plants is setup from before with 2 90 degree bends.
Week 11
Setup. Ventilation
6y ago
4
6
Solved
topbilling
6" Fan in 3x3 Tent
I bought a 6" fan for a 3x3 Vivosun tent and I'm noticing a good mount of negative pressure even at the lowest setting. Do I need to get a 4" fan? There are some vents on bottom sides of the tent. Can I use those to lessen the pressure? Thanks!
Setup. Ventilation
6y ago
3
Solved
Hou_Stone
Air inlet ?
Hello, My room is 100x100x200 cm with 2 holes at the bottom and 3 at the top. (400 watt hps lamp) I ordered a 6 inch 350 CFM extractor and i understand how to install it. But how should I make my air inlet ? this is my first grow room
Setup. Ventilation
4y ago
4
Solved
MrGreenMan
Carbon filter effectiveness at harvest
Hey everyone, just wondering if carbon filters actually get rid of 100% of the smell from the harvest point while drying? I can’t smell anything outside the tent at the moment but my plants haven’t all bloomed fully and I need to be prepared, can’t have the neighbours smelling!
Setup. Ventilation
6y ago
2
2
Solved
masdefs33
Tried mini dehumid. still issues with portable ac (added @ 9pm 6/2) see pic for graph
Avg RH was 45%,had spikes @ 80% RH in dark, added portable ac to my tent. It raised avg. RH not lowered. Intake @ 40% RH that runs on a humidity cont. set @45%Now Day RH ~52%, Night RH ~60%.Ac starts RH spikes to 70% in dark. WTF am I doing wrong. Id hate to lose it to mold.
Other. General questions
Setup. Ventilation
3y ago
5
Solved
Gazeye
Risk of bud rot with these conditions?
My tent keeps bouncing between 55-65% throughout the day during mid-late flower stage. Staying between 24-26 C. I have two fans moving air in the tent and the plants are we defoliated. An in-line fan is pulling air out. How much at risk am I for bud rot? Thanks!
Buds. Other
Setup. Ventilation
3y ago
2
2
Solved
Erasmus
Air flow method
I removed the hood from the home AC to run cold air directly into the grow tent with a 4 inch duct at the bottom. I have an inline fan to push hot air out to balance out the air pressure at the top. Is this a good idea or should I just have a fan inside with no in or out?
Week 4
Setup. Ventilation
6y ago
5
Solved
MrFrizz
Fan Set-up to reduce temperature ???
Hey guys I need some advice on the fan set-up to reduce temps! Mine are like 32'C!! I have a big intake sucking through carbon filter, with passive intake + pc fan. Also 1x vent under canopy and 2x above canopy. How can I direct them to reduce temps in the box?? Cheers! #420
Week 14
Setup. Ventilation
6y ago
3
Solved
Nzmk902
Help. Humidity too low
Any hacks to raise humidity in my grow tent?
Setup. Ventilation
6y ago
3
3
Solved
BooBoosHotBoxCornGrow
Temp tent issue
Nice! Thanks guys for the quick help! I’m also kinda sort of having a temp issue, I’m trying to make it the best I can, I’m way down south and the temp reads 86-88 a lot. If I blast the fans and humidifier it does get down but I’m worried about the electric bill going up.
Week 1
Setup. Ventilation
6y ago
3
3
Solved
DabNinja710
couple quick questions
Do I need to close the flap to the vent during dark cycles? (Lights off during the day) and should I block lights coming from fan power, humidifier, dehumidifier, or indicator lights? Also do I need to use the carbon filter the whole time? should I ever have the exaust fan off?
Week 2
Setup. Lighting
Setup. Ventilation
6y ago
3
3
Solved
Basementgrow05
Help! Drying ?!?
So I have my plants about too finish but not all so I have too find a space too dry them when I chop them down and what would be better trimmed hang dry for a day or 2 and then push them in jars but boveda packs or is 71 61 too high F & RH
Week 10
Setup. Ventilation
5y ago
1
7
Solved
BigDaddyK
Humidity ?
When should I remove the top of the propagator ?
Week 1
Setup. Ventilation
7y ago
6
4
Solved
alhambra
Exhausting air outside when using Air Conditioning, yes or no?
Hi there. This is my first indoor grow in soil. I have a room with A/C. The grow tent is in that room. My question is, should I be exhausting the air from the tent outside or into the room. If i exahust the air outside, isn't it counter productive to the A/C?
Setup. Ventilation
3y ago
3
3
Solved
Mrs_Larimar
DEHUMIFIDIER
Hello Horticultists. Iam looking for a Dehumifidier. With low power consumption and low output of warm air(or no output) any recommendations with ashopping link are very Appreciated
Setup. Ventilation
5y ago
2
3
Solved
HillsideManor
Would it be possible to have a closed loop ventilation system?
My tent is in a garage that gets very cold, i need the fan running so i have constant negative pressure so there is no smell. Could i just have the fan extract back into the tent with a CO2 bag in there? Heat shouldn't get too high, and only other thing i could think of was CO2
Setup. Ventilation
5y ago
2
2
Solved
RekNBlazed
Humidity too low?
Is 38%-40% humidity to low for this size seedling? Am i going to have to invest in a humidifier?
Setup. Ventilation
6y ago
4
4