Negative pressure

So my tent is pulling the walls in when I have the exhaust/filter on, no intake, and I have a 3x3x6 with a 6” exhaust/filter set up. If I open the vents I’m good but face the problem of my humidity dropping to low due to the air coming in. I’m running a humidifier already. Any ideas?

humidify the air on the outside of your tent..............or get an air intake

Ty5594 said:

So my tent is pulling the walls in when I have the exhaust/filter on, no intake, and I have a 3x3x6 with a 6” exhaust/filter set up. If I open the vents I’m good but face the problem of my humidity dropping to low due to the air coming in. I’m running a humidifier already. Any ideas?

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From what I’ve read your tent should suck in a little since it’s pulling air from outside sucking in

mine does this as my filter and exhaust fan are both inside the tent

Your tent should be exchanging air, not necessarily pulling all the air out of the tent for it to show negative pressure. You can get the same desired affect by adding an air intake of a lesser power as the outtake thus exchanging air more efficiently

Ty5594 said:

So my tent is pulling the walls in when I have the exhaust/filter on, no intake, and I have a 3x3x6 with a 6” exhaust/filter set up. If I open the vents I’m good but face the problem of my humidity dropping to low due to the air coming in. I’m running a humidifier already. Any ideas?

Click to expand...

Its pretty easy to manage humidity by controlling temp. My highest is when i allow the tent to get to the low 80' s, in flower I keep my temps in the mid to low 70's to get the humidity down. Not ideal but it works in my situation.
The main downsides to this is the exhaust isnt running 24/7 so some odor does escape, and humidity spikes at lights out.
I keep the intake flap open as well

follow VPD and you'll be ok. consider a 3 amp variac for your exhaust fan, dont get a cheap $15 speed controller.