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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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Selected By The Grower
Similar Grow Questions
Solved
Collinsy74
Best extraction fan with compatible CFM for grow tent 4ft x 4ft x 6f .t
Hi all, just a quick question about a decent extractor fan for grow tent 4ft x 4ft x 6ft with a compatible CFM. I'm using a black orchid 5" extraction fan with carbon filter just a cheap one to get the grow going..... .any suggestions please thanks in advance 😀
Week 5
Setup. Ventilation
5y ago
4
5
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
Foggedaboudit
Do air extractors fit with any grow tent or do they have specific sizes?
Setup. Ventilation
4y ago
1
1
Solved
Philski87
condensation issue
I have terrible condensation in my tent. My tent is only small 60cm deep 120 wide 150 tall, I have a 6inch desk fan for circulation and a humidifier. I haven't yet I stalled my extractor/filter (awaiting delivery). Will the extractor solve this issue once I install it? Thanks.
Setup. Ventilation
6y ago
1
2
Solved
MrBz21
Ventilation Setup for Smell Attenuation
Is this setup ok? Since the air tent will be recirculating i think the smell will be atenuated. I haven't seen other growers with this setup (I'm a newbie though), so I wonder if there's something wrong with it.
Setup. Ventilation
5y ago
1
3
Solved
Dillsnills
Can I run a 4inch fan to a 6 inch carbon filter? How many plants for 2x2x4?
I'm starting a new grow, I have a 2x2x4tent, can I run a 4 inch fan to my 6 inch carbon filter I have or do I need a 4 inch filter?also how many plants 1 or 2? Should I run kingLED 1200watt or 1000watt? Running Auto's either amnesia,blue Dream'matic. Advice opinions appreciated.
Setup. Strain · Autoflowering
Setup. Lighting
Setup. Ventilation
6y ago
6
5
Solved
Buddie
Humidity problems
Having humidity problems.using 4 inch inline fan with a carbon filter, 400w hid with enclosed hood.(dwc)2weeks from finish Which is better to lower humidity, bigger fan or a dehumidifier? And if a dehumidifier,big one or small one like off amazon.
Week 12
Setup. Ventilation
7y ago
1
1
Solved
Screwie
Extraction fan running
I have a Ambient Q60 tent... When I cover up the air intake holes during light off hours and want to leave the extraction fan running, the air from the whole tent looks like its being sucked out. There's no room for air to get it. Am I doing something wrong?
Setup. Ventilation
6y ago
3
4
Solved
DrCris
Is a fan nessesary?
Do you need a fan if you have a carbon filter with ventilation installed ?
Setup. Ventilation
6y ago
3
3
Solved
XanHalenTGI
Is this clawing, or just droop, (pots fairly dry)And why can’t I get RH below 70% with more than adequate ventilation, I’m recalibrating my hygrometer in the meantime.
Week 5
Leaves. Curl down
Setup. Ventilation
2y ago
1
Solved
NoBammerWeed
Extraction and ventilation of 1.2x1.2x2m tent in bedroom.
Hi, trying to refrain from cutting a hole into ceiling for extraction, can i suffice with the extraction ducting directed to an open window? will this 'mix' the tents expelled O with enough fresh CO2 for passive intake? 1.2x1.2x2m tent, 600wHPS aircooledhood, 4"RVK, PassiveIntake
Setup. Ventilation
7y ago
4
4
Solved
Unkraut
Odor Problem in the last 2-3 weeks
i have a problem with smell in the last 2-3 weeks... i have a 0,80mx1,50m tent with a Rhino Pro carbon filter 765m³/h inside the tent and a carbon filter 800m³/h on the exhaust. smell inside the grow room is quite subliminal but i can recognize it... what would you suggest?
Week 13
Setup. Ventilation
6y ago
3
3
Solved
Andreskaja
I'm still worried because the temperatures still haven't dropped this afternoon, it rose to 33 degrees and I tried, as you see in the videos, putting two fans or one big one and nothing. Do you recommend turning on the light at night in the morning and how would it be to change t
Other. Other
Plant. Other
Setup. Ventilation
4y ago
2
Solved
DWCbuds
Lights airstone c02
What light to plant distance would you set it at? The only test I've done is at 25 inches its stable at 80°f and 75% humidity. When I lower it to 18 inches, the tent read 85°f and 73 humidity. Other question I have is what's your favorite air stone(disk)? Lastly, add c02 yes/no
Week 2
Setup. Strain · Autoflowering
Setup. Lighting
Setup. Ventilation
6y ago
2
2
Solved
Ema26
What’s up guys me again😂 I’ve got my hps up and running and I’ve got the temperature under control by having my fan blowing directly at the light and I’ve added a oscillating tower fan. How can I keep the temps up when lights go off? Many thanks!
Other. Other
Setup. Lighting
Setup. Ventilation
7y ago
3
5
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
AlienScrOG
co2
co2 ... how long does a 1 kg cylinder last 5 square meters of external surface of the box approximately 10-15 cubic meters around the box outside the box box measures 50 cm x 120 x 190 high now you can do it
Setup. Lighting
Setup. Ventilation
Feeding. Other
5y ago
4
4
Solved
KCduzit
Co2 bottle question (Tnb)
Should I be running my exhaust fan and intake fan during the day while I have a Co2 bottle in the tent, or will Scrubbing air make adding it useless?
Week 2
Setup. Ventilation
6y ago
1
1
Solved
TheHighentist
Temperature control - ????Cooling unit???? vs Heat mat
Since im going into flowering soon, i want temperature control. Im planning on buying an "Inkbird ITC-306T", with the function of day and night time. But i dont have space for a aircondition in my tent for cooling Can anyone recommend a cooling unit working similar to a heat mat
Setup. Ventilation
4y ago
2
Solved
triforcepizza
When do I need to start using my duct fan for ventilation?
Should I be using my fan now, or wait until the plants get larger?
Week 1
Setup. Ventilation
6y ago
2
2