Hey brother! So this is probably all over the place on this forum. But the way RH works and why you typically get a higher RH at night. Warmer air (air with more energy in it) expands more as it gets hotter/more energy making more ‘room’ for moisture, that’s why RH is a percentage. And as it gets cold the air contracts making less room for moisture bringing up the percentage of moisture in the air until you hit 100% RH (aka the dew point for that specific amount of moisture within that cubic foot of air).
Now I don’t know what your dry bulb temperate (thermostat) is (but I’m going to assume it’s in the mid-high 60’s). If you go straight up on this chart at about the 67 degree area up to where you hit the 60% curve then go about a quarter the way to the next curve to get to your 66% RH that’ll be the exact point based on the amount of moisture in the air to your dry bulb temp. to where you are on the graph. Now if you want to get your RH, based on that air, down to 40% you’ll have to get that same air up to about 85 degrees. Now a way you can go to work with the natural swing of things is by having your lights on at night. Because ambient RH at night is typically higher than the day time, you’ll be counteracting that with having your tent at a higher temp allowing for more moisture in the air bringing down the percentage. If this makes any sense at all let me know! If not I’ll be able to clarify it a bit more.
After going back and reading a bit more... what’s your temperature at in the grow space? And what’s your ambient RH, from outside the grow space and about another 10-15 feet away from it? Also how close is your exhaust from your intake?
and she looks very happy. Well done bro
Enjoy and best of luck to one and all as always!
