Symptoms of not enough air flow?

AngryMexican

Active Member
Hello guys, wasn't able to find anything by google, so the only option is to ask here :D
Have anybody faced such problem?
 

Kingrow1

Well-Known Member
My plants grow better with no wind, air exchange simple reduces heat and replenishes Co2.

In a closed system with no air exchange wind or air flow plants grew fine as long as the same amount of Co2 the plants used was replaced.

Most studies find adverse effects once wind speed raised above between 0.3m/s - 0.5m/s at leaf level.

Just having a vent open will mean enough Co2 will enter your tent, mechanical extraction is not needed as it disperses easily from high to low density.
 

AngryMexican

Active Member
Do you mean air exchanges or circulation? Air flow is pretty ambiguos and could mean either.
I mean circulation inside the tent.

My plants grow better with no wind, air exchange simple reduces heat and replenishes Co2.

In a closed system with no air exchange wind or air flow plants grew fine as long as the same amount of Co2 the plants used was replaced.

Most studies find adverse effects once wind speed raised above between 0.3m/s - 0.5m/s at leaf level.

Just having a vent open will mean enough Co2 will enter your tent, mechanical extraction is not needed as it disperses easily from high to low density.
I must also depend on RH level I think. If there is no wind at all and the RH level at 90%...
 

SchmoeJoe

Well-Known Member
I mean circulation inside the tent.



I must also depend on RH level I think. If there is no wind at all and the RH level at 90%...
Your Rh shouldn't be that high. I'm guessing you're either not exhausting the tent or not exchanging the air in the room that the tent is exhausting into. No amount of circulation will change your Rh if you're not exchanging the air.
 

vostok

Well-Known Member
Hello guys, wasn't able to find anything by google, so the only option is to ask here :D
Have anybody faced such problem?
if you asked me what the symptoms of poor air flow imo

would be high to very high humidity

sagging not wilted leaves

and type of spongy with old fan leaves

leave even a small gap open at the bottom of the tent and the top

good luck
 

AngryMexican

Active Member
Your Rh shouldn't be that high. I'm guessing you're either not exhausting the tent or not exchanging the air in the room that the tent is exhausting into. No amount of circulation will change your Rh if you're not exchanging the air.
My RH is not that high, it goes from 50 to up to 75, but most of the time 60-65... And I am currently at the end of the week 3
I have 2 tiny circulation fans blowing air around in 3x7 tent so I am trying to figure out if it is not enough... Anyway, went to store to buy 2 more =D
 

SchmoeJoe

Well-Known Member
My RH is not that high, it goes from 50 to up to 75, but most of the time 60-65... And I am currently at the end of the week 3
I have 2 tiny circulation fans blowing air around in 3x7 tent so I am trying to figure out if it is not enough... Anyway, went to store to buy 2 more =D
Do you have an exhaust? 75% is still high enough to be likely to cause mold problems and it will definitely lower your yield.
 
Last edited:

Flowki

Well-Known Member

check out the best vent thread on the web

https://www.icmag.com/ic/showthread.php?t=112862
That's a great system if the outside air is above 60f. If the outside air is cold, sucking from bottom will reduce root zone temps and slow growth/uptake. You can attach ducking to the low intake and lead the ducting half way up the rooms walls or above canopy level. With an oscillating fan near that, the cool air intake will mix with the warm upper air before falling to the root zone. Alternatively close lower intakes and open a top intake, lead ducting down to same location to ensure better mixing. Pointing the fan/s up slightly will also regulate upper/lower temps to a more comfortable level. If in doubt, prioritize root zone temps to 65/70f. Definitely not lower than 60, keep a thermostat on floor.
 

Beeryee

Member
My RH is not that high, it goes from 50 to up to 75, but most of the time 60-65... And I am currently at the end of the week 3
I have 2 tiny circulation fans blowing air around in 3x7 tent so I am trying to figure out if it is not enough... Anyway, went to store to buy 2 more =D
60% and up is hight for flower. Especially late flower with dense buds.
 
Top