Vote Now 🏆 for the Grow Awards 2025!

Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms

Accept

Recommended

Grow QuestionsAdditional fan?

Additional fan?

solar369started grow question 2 years ago

With this size canopy do you recommend a small fan below the buds? I have one circulating right above the canopy very gently moving the top leaves. Air intake is passive open vents at bottom and a 4" AC Infinity T4. Humidity is usually 50-55%.

Open

Setup. Ventilation

likes

Answer

Psyfolkanswered grow question 2 years ago

Hi, very nice looking plant there! I would definitely add some under canopy air circulation and or defoliate a bit to create some space between the colas. keep growing!

1 like

Complain

Mr_Weeds_Autosanswered grow question 2 years ago

Hey Growmie, Yes, I would recommend a small fan at the bottom of the plant to help with airflow, pest and etc., It's something I've always done since growing.

1 like

Complain

Gorrilla420answered grow question 2 years ago

I’m no expert but I tend to run one above the canopy just tickling the top leafs and one below to make sure no heat spots or stale air, and I feel is worth just to add that air movement between nodes and bushier parts of the plant

likes

Complain

Similar Grow Questions

Solved

Can I use a 100mm carbon filter on a 125mm exhaust?So, the title is pretty straightfoward. I was thinkin about getting some 127mm extraction tubes and make it really tight to fit the filter. TIA

Setup. Ventilation

4 years ago

1

2

Solved

Speed of outgoing TD Silent Do you adjust the ventilator speed over time? I have a TD Silent with 5 possible speeds and keep the lowest speed at night (so I can sleep) and on 3 or 4 during day to be sure. Is there a trick to find the best yet lowest speed?

Setup. Ventilation

4 years ago

1

2

Solved

Newbiegrower420

Slowing a two speed inline fan Can I run a fan speed controller with a dual speed inline fan? My 4” two speed fan is slightly too powerful for my grow room. I’d like to slow the fan slightly but I have heard the these types of controllers don’t work with two speed fans? Any advice or what to buy to do the job?

Setup. Ventilation

4 years ago

3

3

Solved

Retailer saying I need a bigger fan 1st post here going to be starting a diary soon, went to buy a complete set up today 240x120x200 tent 2x600w light kits 6" fan rhyno hobby 6" filter & all the rest, but retailer now saying fan & filter in that package won't be sufficient & I need to upgrade to a 8"fan n filter?

Setup. Ventilation

4 years ago

1

5

Solved

How important is humidity?How important is it to keep humidity high in the early stages of growing? We are going in a tent and struggling to keep it above 45%

Setup. Ventilation

4 years ago

3

4

Solved

Newbiegrower420

Humidistat levels vary wildly between Inkbird and ETI humidistats..I have two humidistats, one is an Inkbird 200 for control, the other is ETI 810-195 just for display.. The ETI is showing roughly 9-10% higher humidity levels compared to the Inkbird. Does anyone know which is more accurate? I want it get these humidity levels just right 👌🏼

Setup. Ventilation

4 years ago

2

3

Solved

Newbiegrower420

Using humidistat to control fan, will this cause problems? So far fan running for 30 secs every two minutes! Plz advise if this is not a good idea??My exhaust fan is to powerful no speed control just two settings. On the lowest setting the fan is still sucking all the humidity that my humidifier creates out of the tent. So I have bought a humidity controller hooked it up with the humidifier and fan.. It’s working great!!

Setup. Ventilation

4 years ago

4

4

Solved

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?

Setup. Ventilation

4 years ago

1

1

Solved

Newbiegrower420

Grow tent Temperature I have a 90cmx90cmx60cm grow tent with a VIPARSPECTRA 300W LED Grow Light inside.. How much will an extraction fan and carbon filter bring down the temp inside? In this heatwave my tent is running at 33 deg C, no plants seeded yet. Will the fan be enough or should I get a cooler?

Setup. Ventilation

4 years ago

2

2

Solved

Newbiegrower420

Cooling whilst using humidifier outside a small grow tent I have a small 90x90x60cm grow tent with a VIPARSPECTRA 300W LED. Heat levels are crazy and running a small humidifier with ice blocks inside the tent along side extraction isn’t cutting it. Could I buy a bigger humidifier, keep it outside the tent duct it in to keep it cool?

Setup. Ventilation

4 years ago

4

10

Solved

fire harard What is your security/safety backup for fire hazard in case of exhaust system failure. (those Chinese fans you know they will break it is only a matter of time right?)

Setup. Ventilation

4 years ago

7

8

Solved

What equipment do I need to close my tent fully??I want to be able to close my tent completely without it getting too hot in there, I currently have it open to keep it cool, but what do I need to close it? Isit just some ducting and fans and also a air con unit?

Setup. Ventilation

Setup. Other

4 years ago

1

4

Solved

What air temp and RH should i be trying to acheive for flowering?What should i be trying to acheive with RH and air temp for flower stage. I recently was subject to some intense heat and RH shot up to 92%. I have ordered a De humidifier to combat that and i have a fairly decent control over the air temps but i am not sure what i am trying for.

Setup. Ventilation

4 years ago

4

4

Solved

Looking for some input.Looking for some input on inline fans n carbon filter for a 2x2x4 grow tent. Which ones to get/ stay away from? 6in or 4in? Much appreciated.

Setup. Ventilation

4 years ago

3

3

Solved

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.

Setup. Ventilation

4 years ago

4

6

Solved

High humidity.Does anyone have some sage advice on how to keep humidity down? Today we had 36c outside temps and humidity in my tent hit 85%.. Firstly is this an issue? I normally have a reading of 50-60% but I can't lower it today. Second, how can I lower it.

Setup. Ventilation

4 years ago

2

2

Solved

2200w LED Hiii I got two LEDlamps 2200w in total but can’t use their max power cuz the temperature will be over 37soon! In order to cool down the tent I’ll need a true AC or a powerful fan, both of these products in photo are dehumidifiers as well, that 80€fan will cool ⬇️? Cuz im on budge

Setup. Ventilation

5 years ago

1

2

Solved

Humidity problems in bloom I have a 16inch fan outside the intake hole to my tent blowing air in, I have 2 clip on fans one each side of the tent and a carbon filter. There’s a dehumidifier 300ml per day in the middle of my tent. This is a 4x4 tent. Any tips on placement to lower rh? It goes high as 80%.TY

Setup. Ventilation

4 years ago

2

2

Solved

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

5 years ago

3

3

Solved

Circulation / Exhaust Getting ready to install carbon filter; found myself wondering if growers typically leave their filters/exhaust/fans on during dark periods? Up to this point, I've had everything on one power-strip/timer: circulation fan, exhaust fans, and lights. Should I keep anything on 24/7?

Setup. Ventilation

5 years ago

2

2