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freshwaterjellyfish started grow question 4 years ago
My grow tent is about 2 1/4 feet x 4 x 6 ft . I use an inline exhaust fan on a cycle timer. 400 watt . I have HEPA filters mounted on the little windows for clean passive air- no intake fan.

To keep the RH up and temp down can anyone recommend a cycle time for the exhaust fan?
Week 5
Techniques. Defoliation
CRiSPrGrow answered grow question 4 years ago
always keep the exhaust running no matter what, you'd e surprised how quickly bud rot sets in even a short break will increase your chances of getting damaging bud rot in there. good news is the exhaust will help with temperature. for increasing the humidity, you can get a humidifier, or even an evaporation cooler if you want to also keep the temperature down. these can be quite cheap also. So short answer : never turn off the exhaust, and get some cool mist . your plants will surely love it ! Hope this helps ! :rocket:
OutForReal answered grow question 4 years ago
From what I can see you found the good thing to do between weeks 5 and 6 you reached an higher RH and kept the temps at a good level , you will just have to get back to your week 5 parameters when you will be in late flowering ( you will need a lower RH to avoid bud rot ) :blush::+1: