Tent Ventalaltion Questions

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Smokenpassout

Well-Known Member
So I have a 2x2.5x7 tent. Air is sucked in passively via a 4" fan, passed through carbon and exhausted via ducting. Do I need to have the fan on 24/7? I was thinking of just killing the fan for 12 hours a day (night period). Id still have circulatory air inside via a small fan. Although I may have to run the fan 24/7 deeper into flowering becuase of smell. I just wonder are there any negatives to not intaking fresh air during lights out period?
 
mr sunshine

mr sunshine

Well-Known Member
Smokenpassout said:
So I have a 2x2.5x7 tent. Air is sucked in passively via a 4" fan, passed through carbon and exhausted via ducting. Do I need to have the fan on 24/7? I was thinking of just killing the fan for 12 hours a day (night period). Id still have circulatory air inside via a small fan. Although I may have to run the fan 24/7 deeper into flowering becuase of smell. I just wonder are there any negatives to not intaking fresh air during lights out period?
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Plants release toxins.. also, co2 depletion ...When it's gone it's gone! Doubt those baby vents let enough in on their own. I would leave it on..not for the heat just so they can breathe. ..maybe buy a fan speed controller and lower the speed. or you can have it on a timer and let it turn on every hour or so for 5 minutes during lights Out.
 
S

Smokenpassout

Well-Known Member
Thanks. I do have the fan on a fan speed controller. So if I stop airflow for long periods, CO2 is eventually depleted and growth slows or suffers? Sounds like I need to keep the fan on 24-7.
 
nomofatum

nomofatum

Well-Known Member
mr sunshine said:
Plants release toxins.. also, co2 depletion ...When it's gone it's gone! Doubt those baby vents let enough in on their own. I would leave it on..not for the heat just so they can breathe. ..maybe buy a fan speed controller and lower the speed. or you can have it on a timer and let it turn on every hour or so for 5 minutes during lights Out.
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The toxins and co2 depletion I call bullshit on. The real issues are air leaks, the warmer air, especially just after lights out will find ways out of the room, with the smell. Also if the air cools much over night the RH will climb to dangerous levels, could even form dew on the plants and wall in some cases. Best design would be to run at much lower speed at night, assuming your intake is climate controlled air from your home.
 
mr sunshine

mr sunshine

Well-Known Member
nomofatum said:
The toxins and co2 depletion I call bullshit on. The real issues are air leaks, the warmer air, especially just after lights out will find ways out of the room, with the smell. Also if the air cools much over night the RH will climb to dangerous levels, could even form dew on the plants and wall in some cases. Best design would be to run at much lower speed at night, assuming your intake is climate controlled air from your home.
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bullshit??yea ,probably !either way I agree it should stay on. or on and off on a timer
 
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