Grow tent open or totally sealed

Does anyone leave their tent partially open when lights are on? I have a 4 inch and 6 inch exhaust. If I run the 4 inch and keep my tent closed, it can’t keep up with the high temperature from my light. If I use the 6 inch, then the humidity drops down to like 30% and my humidifier can’t keep up. Any advice would be greatly appreciated.

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Increase airflow.

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How? I already have two oscillating fans in there.

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I bought piece of duct work that slid right inside mine and ran flex duct for AC…


If you can it works great…
Happy growing…

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You run your ac during the winter?

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It’s 80 here

Ahh it’s only 30 where I’m at.

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Fans only increase air circulation. You need to increase air throughput through the tent to manage temp or RH. More air in and more air out.

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Your tent has vents on it open them up…
Raise your humidity level will also get your temps down…

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How do I increase airflow then?

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I’m on day 19 of flower and my humidity stays between 49-55%.

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Increase airflow via both input (bottom vents) and output (top vents.)

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Maybe I’m an idiot but I’m not understanding. So keep my 4 inch exhaust at the top vent and use the 6 inch at the bottom vent?

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What size tent are you using? One 6 inch exhaust fan will turn over more air than needed in a 4x4 tent with no problem.

I’m in a 5x5. This is my first grow in it. I feel like the environment was much easier to control in my 4x4. I don’t know how to stop my 6 inch exhaust from sucking out all the humidity. I mean it drop from 55% to 30% in just a minute or two. Makes no sense.

Supply air in? That’s awesome

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Then if I use the 4 inch and keep my tent closed the temp goes in the mid 80s. It’s a lose, lose.

Hopefully you have your exhaust fan on a variable speed. I control the temperature and humidity in the lung room that I pull my fresh air out of 12x10
room with a 4x4 tent inside of the room .

I was assuming you were in my situation …
My tent was running hot cause temps outside here are rising…
AC works perfectly for me right now 3rd week since I have flipped to flower…
My temps while lights on are right around 80
And like 68-70 lights out…

Happy growing…

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I have the 4 inch on medium power but even on full power it’s not strong enough to keep the temperature in check with the tent closed. My lung room stays between 65-70. When I tried the 6 inch on low that’s what sucked out all my humidity.

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