My buds are starting to swell and I’m getting nervous of my tents RH%. I have a 40pint dehumidifier in my basement that maintains an RH of 50% in my basement, but when the lights go out in my tent the humidity goes up to 75% with a temp of 66%. No matter what fan speed I put my AC infinity T8 on it won’t drop the humidity until lights come back on. Can anyone recommend a dehumidifier to add inside my 8x4 tent?
I can maintain proper VPD with lights on, but I have a problem with lights out.
It’s just an idea but what if you added a heater to keep temperature up slightly higher? I’m assuming that the heat from the light some how helps or is it possible to drop the humidity in the basement lower then 50% in preparation for lights out?
Or can you point the exhaust of the humidifier directly bowing into the intake of your tent…
Don’t have to necessarily put a humidifier in their, you just need to get the dry air in there, even a make shift ducting system from the humidifier to the intake of the tent.
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Never thought about that. Make a ducting and connect to one of my 8inch ports for lights out and remove it in the morning. Maybe that will work.
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Just not really sure if that will work, I mean with all my vents opened on the tent it’s already pulling in 50%RH air from the room.
Maybe even turn the fan down so it still pulls air in but not empty it out so fast.
I can keep my closet about 10% lower then the room it’s in by just pointing the exhaust of mine at the vent.
I also in the summer use a long peice of ducting just laid from my HVAC to the vent to keep it cool… 
Good luck with it
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Ok, I’ve already tried the fan on every speed possible. I’ll try the ducting thing next.
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Idk what the humidity of the air coming out of the humidifier is but I imagine it’s super low so it could work to good 
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Only one way to find out haha
Good news here, your vpd doesn’t really matter when lights are out. Things like mold won’t care though, so best not to get into a situation where moisture is settling out of the air.
If you’re increase fan speed but not seeing a difference could mean your intake is the choke point. What are you using for intake, and is it possible to make it larger? Or maybe assist with something like a cheap duct or desk fan? Keeping temp up could fix too.
Exactly why I’m worried that my RH% is so high with my buds starting to fatten up, I don’t want rot/mold 
I do not have an intake fan, but I do have all 4 vents open on my tent.
I have 4x6inch fans and 1x36inch tower fan with 360 degree oscillation.
I’m gonna go grab one today and see if that helps 
Thank you very much for your help 
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Colder temps = lower humidity…
Use a dehumidifier
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“”Cold air can’t retain as much moisture , so high humidity is less common in chilly weather. … Inside your house, lowering the temperature is an effective way to minimize humidity to a certain extent, because the air simply can’t hold on to the same level of moisture when it’s cooler“”
I have a 40 pint dehumidifier in my lung room maintaining a 50%RH. When my tent is 75 degrees my RH is 60%. When my lights go out and my tent drops to 66 degrees my RH goes up to 75%+
This is exactly why he’s seeing the rh spike. There isn’t more moisture magically appearing into the air. The light goes out and temperature drops, now the same amount of moisture in the air is a higher rh% because the saturation point changes with the temperature. Basically the definition of relative humidity, because the humidity % is relative to the saturation point at the same temperature. When the temperature changes so does the saturation point.
Dropping temperature without lowering the actual moisture content will actually increase the rh %. You would need to increase temperature to drop relative humidity.
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Exactly, I’m glad you wrote that clarify my thoughts lol.
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Hence why when my lights are on my RH is lower because my lights raise my temp
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Swap dehumidifier to tent instead of the lung