I’ve got something going on with my ventilation I’m not sure how to resolve.
Preface: I moved House over the pandemic and have my new grow space all set up in the basement.
Here’s the issue - my fan controller is set to kick on if RH is above 60% or temp is above 79F. During the day temps are consistently 78-79 which I’m fine with and humidity is 45-50. Overnight the light is off and the room cools down as you’d expect and the exhaust fan shuts off. Then the RH starts to creep up. Then the exhaust fan kicks on bring the RH down and in doing so pulls in more cool air. Then start the vicious cycle of getting cooler and cooler and as the air cools the RH doesn’t drop.
By the morning it’s like 63° in my tent. Obviously not a big deal for the temp to be dropping into the 60s at night but it’s like does my fan really need to be chugging along all night long??
I realize how relative humidity works and the fact that the air is getting cooler just means that it holds less moisture and so for the same amount of water in the air at a given temperature my relative humidity is either going to go up or at least remain constant as the temperature continues to drop.
The most obvious solution to me is a fancy your fan controller that I can program for day and night modes but makes me wonder if I am missing a simpler solution