Condensation problems

Has anyone encountered condensation problems in their grow tent. My duct work is pouring water everywhere and obviously it is because of the cold air being sucked in but how do I stop the condensation from happening while maintaining my healthy grow atmosphere. Everything is perfect except my humidity which is ironically still not getting above 34% even with a humidifier on max and the condensation. I have air circulation in the tent. Any thoughts or ideas?


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With all that water in your tent is hard to believe RH is only 32.

I know it's blowing my mind


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Bose said:

With all that water in your tent is hard to believe RH is only 32.

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I do know that it works though. I tested it in my steaming bathroom to be sure lol. I just don't know what's going on [emoji57]


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I don't believe you should use the humidifier at all. But if u must use it for your little babies keep your humidifier on low and take the cups off. But if I had your set up I would use no humidifier, and leave the cups on with the lights really close till you get your first true leaves. Then take the cups off.
I still wouldn't use the humidifier at all unless you were at like 5 percent or something. Also I should say with the cup your seedling will have enough humidity from the moist soil Good luck

PS. Might want to invest in a better RH reader

Why do u have a humidifier?
Plants will thrive @ 20% humidity is overated.

GravZilla said:

I don't believe you should use the humidifier at all. But if u must use it for your little babies keep your humidifier on low and take the cups off. But if I had your set up I would use no humidifier, and leave the cups on with the lights really close till you get your first true leaves. Then take the cups off.
I still wouldn't use the humidifier at all unless you were at like 5 percent or something. Also I should say with the cup your seedling will have enough humidity from the moist soil Good luck

PS. Might want to invest in a better RH reader

Click to expand...

I had to take the cups off 2 days ago. That pics was from 2 days ago. The other two pictures were from tonight. That's when I put the humidifier in.


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hellmutt bones said:

Why do u have a humidifier?
Plants will thrive @ 20% humidity is overated.

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Because from everything I have read seedlings need a humidity of around 60% to get a good root growth going, and overall a good thriving plant. Without the humidifier my humidity level was around 17%.


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Yeah brother unless you have some ridiculous exhaust system pulling all the moisture from the air in the tent making it as dry as a desert in there. I still wouldn't use a humidifier. I would just chill out on the air flow. I have good air flow going out and coming in on my babies they are three weeks old thriving on 20-25 % rh...... definitely don't need the humidifier. I like the " do anything and everything I can for my girls!!! Mindset. But don't over complicate. Its hard for me not to think about my girls constantly. drives me crazy, but knowing I have the patience motivates me

And its hard to test the rh right around your plants that's comming off the soil. Obviously its going to be higher right there rather than other places in your tent. Have faith young jedi

blue...yum said:

Because from everything I have read seedlings need a humidity of around 60% to get a good root growth going, and overall a good thriving plant. Without the humidifier my humidity level was around 17%.


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Click to expand...

Ur main concern should be too much humidity.. seedlings 90% of the time die because of dampening off wich is a direct result of humidity.
I would just put a cup of water nearby if u want some humidity.

If you aren't getting your humidity to climb with a humidifier in tent on max and you are developing moisture on your duct work, I'd suggest turning your exhaust fan on low or put it on a temp switch so it doesnt run so much. Im thinking your air exchange is far too fast for the environment of the tent. How cold is the air you are pulling in that it is condensating on your duct work? I would imagine it would have to be extreme if it is going to condensate like that? Think in terms of a toilet tank sweating on a hot summer day from the cold water in the back of the tank.

HydroRed said:

If you aren't getting your humidity to climb with a humidifier in tent on max and you are developing moisture on your duct work, I'd suggest turning your exhaust fan on low or put it on a temp switch so it doesnt run so much. Im thinking your air exchange is far too fast for the environment of the tent. How cold is the air you are pulling in that it is condensating on your duct work? I would imagine it would have to be extreme if it is going to condensate like that? Think in terms of a toilet tank sweating on a hot summer day from the cold water in the back of the tank.

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Last night I switched the fan on the lowest setting possible and turned the humidifier on low. The air that is getting sucked in is probably around 30-50 degrees during the day. But it is needed to keep my grow tent at a comfortable temperature.


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Thanks everyone!


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Pull warmer air in.. Otherwise it's going to condensate no way to beat science on that.. Possibly insulating the hose will help.. But condensation lingering in insulation can cause bigger issues

Put a little portable heater in there to remove excess moisture from the tent, that's what I had to do. I was sucking cold air into my warm tent and was creating condensation.

Kcbscrogger said:

Put a little portable heater in there to remove excess moisture from the tent, that's what I had to do. I was sucking cold air into my warm tent and was creating condensation.

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Putting a heater in my tent is the last thing I want to do. It will just raise my temp in there which I don't want the temp inside is perfect. What I did do is turn the fan completely off and I will see how the temp does without the fan on. I still have a small fan moving air inside the tent. If it starts getting to hot again what I will try doing next is reversing my fan and blowing the air the opposite direction. Hopefully one of these two solutions will work.


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Forgive me for talking shit, but this thread makes me wanna do this

Throw that damn humidifier in the trash. Or put it in your room for when you get sick

Or don't listen to people that have been growing for years and end up fucking up your plants and grow room.

Your choice.... I'm just glad I don't have water droplets all on my shit.




Edit: keep in mind YOU are creating this condensation problem...

You should pull in room temp air, and exhaust outside to the cold air (likely opposite of what you are currently doing). You are going to continually have this isssue if you are pulling 30 degree air into a 80 degree room with no buffer. If you cant maintain a normal temp in your tent without pulling in 30 degree air, your tent is too small or your light is too big and hot and its not vented properly to have correct air exchange. Room temp air is cool enough to cool an aircooled light. Its where you put the heat that most have the issue with. Follow this quick diagram I drew up and you wont have any issues with stink/heat/condensation.

Gary Goodson said:

Forgive me for talking shit, but this thread makes me wanna do this

Throw that damn humidifier in the trash. Or put it in your room for when you get sick

Or don't listen to people that have been growing for years and end up fucking up your plants and grow room.

Your choice.... I'm just glad I don't have water droplets all on my shit.




Edit: keep in mind YOU are creating this condensation problem...

Click to expand...

I don't have a problem taking the humidifier out that's not an issue but I don't think it is contributing to the condensation. That is because of the cold air being sucked in by the inline fan


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