Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Clip fan question
Xi_Ve
started grow question 5y 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
PenguHB
answered grow question 5y 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!
1 like
Complain
Selected By The Grower
TheReefinery
answered grow question 5y ago
Switch that bad boy on!! The more air circulation the better!!
1 like
Complain
Similar Grow Questions
Solved
dauntless
Humidity at night. Should I add a heater or...
Lights on day, my temps are perfect, and my humidity is 55-59% at 74-80 degrees F. Night, temps drop to the 60s and humidity goes up to 70-78%. Bought tiny dehumidifier to add, and I could also small heater. Is 70-78% gonna mess me up? Indoor/Outdoor And Winter is coming. ;)
Week 11
Setup. Ventilation
6y ago
2
Solved
Nicogreen
Placering af hydro meter
Hvor i teltet er det bedste sted for hydro-termometer? ️Da jeg har blæser i bund! Og i top.! Plus udsugning til kulfilter nederste højre hjørne v åbningen (altså det første hul i højre nedre hjørne.
Setup. Ventilation
3y ago
1
2
Solved
Codybadger
A/C Recommendations
I need an ac unit for my 4x4. Any suggestions would be appreciated. Ballin on a budget also, want a low price for decent a/c. 💨❄️
Setup. Ventilation
3y ago
1
1
Solved
idkman1337
High humidity during flowering
I don't have an exhaust fan since this is my first growth and I'm quite on a budget my humidity averages around 65-75% I know high humidity increases risk of mould and bud rot is it necessary to get an exhaust fan and aiming for 40-50% or just risking the consequences?
Week 9
Setup. Ventilation
4y ago
1
1
Solved
RedArmC3PO
Carbon filter sleeve needed?
I use the carbon filter on the exhaust side. On the intake side, I have a dust screen mesh. The tent is quite clean so that’s why I don’t see the need of the pre filter. Would also probably load the inline fan a bit too. What’s you thought?
Setup. Ventilation
3y ago
5
3
Solved
TheNextGanjaMan
High humidity
Hello. Even with a dehumidifier and a 24-hour extractor, the humidity is still above 70% and one of the plants is almost in the flowering period. Can I add expanded clay on top of the vase to see if it lowers the humidity or putting more perlite will solve this? Thanks.
Other. General questions
Setup. Ventilation
4y ago
3
Solved
Gewroo
What to do with vent flaps on tent?
What to do with vent flaps at bottom of my 2 x 2 tent? Exhaust fan running at ~33% speed with carbon filter in tent as intake. Tent In cold room (overnight temps 45-55*F) , running heater and humidifier in tent. Currently, 2 of 3 flaps tented at bottom of flap to allow air in.
Week 2
Setup. Ventilation
6y ago
4
2
Solved
GR0WER
Ventilators OFF/ON
Hi, guys. I have one more question today: - My box has three ventilators. One is working in the upper air channel all the time to bring out hot air. Other two staring on my plants. Should I use all three of them? Or one is enough till my babies will grow thick to pervent mould?
Week 1
Setup. Ventilation
4y ago
2
1
Solved
Sedden
Grower Ventilation
I need to create an air exchange scheme inside my grower, but I cannot afford to buy an exhaust fan, I have some coolers and I would like to know if it is possible to continue with them and how many coolers would be recommended to put in my grower
Setup. Ventilation
5y ago
2
2
Solved
PoleKat
Looking for someone to look at my pics and give me advice on ventilation for mini grow room. Also if my plants look good for day 3? Any tips? Thanks!!!!
Hi, wondering is you guys could look at my enclosure and give me some ideas as to when and how I should provide some air circulation to my seedlings? I plan to keep them in here for the next couple weeks like a small grow room. Also, do they look happy for day#3? Advice? Thanx
Week 1
Setup. Strain - Autoflowering
Setup. Lighting
Setup. Ventilation
6y ago
4
2
Solved
Maskedcucumber
Humidity won't go down because of clay pebbles ?
Though my extractor is at high speed, I have a hard time with controlling humidity, I hardly go under 68%, specially during the night. Probably it's the clay pebbles since the pots don't have a lid. I placed the temp/humidity probe near the tallest leaves. what do you think ?
Week 5
Other. Mold
Setup. Ventilation
5y ago
3
3
Solved
Hongo
Please look at the leaves shown, orange and dried parts. I asked a similar question earlier but these look more damaged and I'm wondering if it's worsened due to my setup. Wind damage from fans? Water damage from humidifier? Light or heat damage? Managing VPD is tough. Thanks!
Week 8
Leaves. Color - Mottling
Setup. Strain - Autoflowering
Setup. Ventilation
4y ago
5
4
Solved
kizdog
Controlling environment in closet with no intake fan?
I'm growing inside my closet, and I'm having trouble controlling temp/humidity. I have an AC Infinity exhaust fan and a cheap amazon fan + wet towel blowing air in from the outside. Are there any cost-effective ways for me to control this? It can get a little warm/dry sometimes
Week 2
Other. General questions
Setup. Ventilation
5y ago
2
2
Solved
XanHalenTGI
This is windburn right?
This is windburn right? left 2 fans on for 48hr, when I usually alternate between them each day.. Anything i can do to help recovery? should i have fans on a timer to give some fan downtime?
Week 4
Leaves. Wilting
Leaves. Other
Setup. Ventilation
1y ago
8
7
Solved
Ph0en1x
Struggle too keep Plants healthy
Hey, I really struggle with the heat. In the night, when my light Mars Hydro FC-E4800 is running currently at slightly less then 25%. My tent already reaches temperatures of 29Celsius. Though to increase the strength of my activated carbon filter, decreases my humidity too much
Leaves. Curl down
Plant. Stem - Weak
Setup. Ventilation
10mo ago
1
Solved
Prilyfe13
How do I drop my RH down when nothing works? Check Diary. Will defoliation be a good idea? Open tent door and leave it open?
My 2x2 is starting to crowd. This is driving the RH to over 70%. Should I defoliate to help with crowding and RH? Or should I just leave it alone? RH in lung room is 48% Exhaust fan, high or low with a dehumidifier, doesn't work. What should I do? Defoliate? Thanks! Check diary.
Week 5
Plant. Other
Setup. Ventilation
Techniques. Defoliation
3y ago
4
5
Solved
Glennh109
High humidity problem
The fan heater i use 1500w seem to heat the room up too quick gets up to temp quick but carries on rising another 1.5 degrees before vent fan kicks in!! Do I need to downsize the heater space is about 1.5m2
Setup. Ventilation
6y ago
1
1
Solved
supermegadjj
Extraction can size for 2x2x5 tent ?
Hi guys I'm about to set up my first box, I'm missing just the extraction. Box is 2x2x5 and I've got led light 120w. No smell is the most important for me. Is 4" fan with carbon filter going to absorb all the smell? Many thanks !
Setup. Ventilation
6y ago
3
3
Solved
moosebones1241
Temp fluctuates
With the Heater I have(analog setting) fluctuates (needs to drop 6 degrees) before kicking on. So my Lights off temp fluctuates from 67F lowest(about 5min) to peak 74F(<5min) maintaining an average of 70F lights off. Is this too much of a swing?
Week 3
Setup. Ventilation
4y ago
1
3
Solved
Puffdamagikchillum
Tips on where to exaust air flow from grow tent
Week 1
Setup. Ventilation
6y ago
5
6