The Grow Awards 2026 🏆 
Clip fan question
Xi_Vestarted grow question 4y ago
Should i turn on the clip fans on low power and let them blow on the girls, or just leave the big fan blowing under the light?
Solved
Setup. Ventilation
likes
PenguHBanswered grow question 4y ago
If it is week 1 of veg then a small fan on low power, just enough to move the leaves a little bit. Later on - both bad boys on. Big fan on the top, small one on the bottom. Good luck!
TheReefineryanswered grow question 4y ago
Switch that bad boy on!! The more air circulation the better!!
1 like
Complain
Similar Grow Questions
Solved
EJBudz
how to ventilate closet grow in apartmentwhat to do with ventilation. They say autoflowers dont depend so much on a light cycle, so could i leave the closet door open? not too worried about smell
in an apartment (1st of 2 floors, duplex style) so im a bit wary of any alterations of the apartment itself. bite the bulletSetup. Ventilation
3y ago
8
7
Solved
TeesTrees
should i get a table AC unit to cool room for night temp by 15 degrees?Iv read that to get the purple colour from the plant i have to get night time temp to be 15 degrees lower than day temp. Im working with basically a 1 sqr meter space and i was going to buy a tower ac unit to cool the temp down Or one of those ac units where you put ice and waterSetup. Strain - Autoflowering
Setup. Ventilation
Techniques. Other
3y ago
1
8
Solved
UrbanPlannerGrower
Help Dropping HumidityHi Bud.I have a zootly tent with two flap mesh vents at the bottom. I have a secret jardin exhaust fan and filter. I'm trying to get my tent at 50% r/h but cannot drop lower than 65% and I'm in early flower. I have one of the flap mesh vents opened for passive intake. Please helpOther. General questions
Setup. Lighting
Setup. Ventilation
3y ago
4
Solved
Faegrows
How to reduce humidity in my grow space?I'm just an amateur and am growing in my closet as I have very limited space. It's a small space in which I can't cut holes or openings. I use a small fan and a air purifier. Should I get more fans? Does a carbon filter or inline duct help if it can't exit out of the closet?Setup. Ventilation
3y ago
3
5
Solved
HerrTom
Brauche ich unbedingt einen (Schwenk-) Lüfter in meiner Growbox?Habt ihr schon mal ohne (Schwenk-) Ventilator in der Growbox angebaut? Wenn ja, welche Erfahrung habt ihr dabei gemacht? Ich möchte nur ungern einen Ventilator einsetzen, weil das vermutlich die Lautstärke der Box deutlich erhöht. Schon mal vielen Dank für eure Erfahrungen.Setup. Ventilation
1y ago
9
8
Solved
Collinsy74
Best extraction fan with compatible CFM for grow tent 4ft x 4ft x 6f .tHi 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
4y ago
8
5
Solved
TheHighentist
Temperature control - ????Cooling unit???? vs Heat matSince 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 matSetup. Ventilation
4y ago
2
Solved
fuckitimhigh
Anyone tried a plasma filter instead of a carbon filter?Supposedly superior odor elimination over carbon filters
Look here. https://www.youtube.com/watch?v=kwiNUkjL1Dk
As you can see they resemble carbon filters (they're part carbon filter actually). The only question is...can they run 24 hours a day for 3 weeks?
Anyone tried them?Setup. Ventilation
4y ago
1
2
Solved
GreenCosmos
(MarsHydro) Anyone have experience with this combo?I'm thinking about upgrading my ultra cheap duct fan and carbon filter to this beauty.
It has a thermostat controller and is under 250€.
It seems to good to be true for this price.
Is anyone using it and give me a review?Setup. Ventilation
2y ago
8
6
Solved
TerpTurtle
climate controlAny tips on controlling humidity swings? im trying to balance out the intake & outtake, ive tried to turn off the system just have the dehumidifier run.. but am working harder than I feel like I should. just looking for some tips on keeping a consistent environment.Week 11
Setup. Ventilation
5y ago
3
2
Solved
masdefs33
Tried mini dehumid. still issues with portable ac (added @ 9pm 6/2) see pic for graphAvg 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
BullWeedDog
Capa de Cultivo Inflada presión positiva puede generar esto un problema???Hola mi carpa de cultivo tiene ahora mismo lo que parece una precio positiva, es decir, le he colocado un Extractor Tubular VK con un Flujo de aire 365 (m3 / h) esta conectado a un filtro anti olor y un Intractor TT de dos velocidades 220-280 (m3 / h) utilizando 1 velocidadSetup. Ventilation
4y ago
1
1
Solved
TioRandy
Humidity in a small tentHow to preserve optimal humidity in a small tent? My target humidity is 70 as I am germinating. My tent is 60*60*160. The smallest vent is on the picture I have attached (310 m3/h, 180PA). I have a Xiaomi Humidifier running on the maximum 24h, but still no helpSetup. Ventilation
2y ago
12
9
Solved
KCduzit
How can I get my humidity down? (Basement grow tent)Plants are currently sitting at Rh 55% on my controller on day one of flower. I have a small $40 probreeze (Amazon) dehumidifier In the tent and am using a 4 inch intake (full strength) and 6 inch exhaust fan (1/4 strength). Day Temps around 25 Celsius in basement5y ago
2
3
Solved
smallgrow
Intake Fans / Opening Lower Air Ducts or Back Flap?I'm researching intake fans and/or opening lower ducts to pull air in. I never worried about intake in the past, I just made sure my fan up top was sucking air out of the tent to create negative pressure. Thoughts on intake fans or having the back flap of the tent open? Thanks!Setup. Ventilation
5y ago
5
4
Solved
TiRobotProds
SéchageBonjour a tous comment faites vous pour le séchage. Cela m'intéresse beaucoup merci pour vos réponses.Setup. Ventilation
4y ago
1
Solved
PapaBaer
BelüftungHey Ho bisher ging es mit meinen 2 kleinen Ventilatoren im Eingang und der Abluft mitten drin. Da ganz hinten keine Luft ankommt und die Zirkulation recht lange dauert ( rauch hält sich ca 1 min bis er ventiliert ist)
wollte ich fragen welchen ventilator ich da Installieren soll?Week 14
Setup. Ventilation
4y ago
1