first time flowering. pressure problems?

[josh.r]

I have a 8 by 16ft flower room with 1 6 inch intake fan 440cfn, and 3 6 inch fans connected to 4 600 watt hoods and filter in the shape of a U, venting out the room and of my basement window. My question is, when trying to open the door to the flower room i notice a large amount of pressure pushing on the door, which means i have positive pressure in the room. Is this OK? will i have and problems from positive pressure? anyone with the same problem before?. Thanks I'm also thinking about buying something to adjust the speed on the intake fan. should I?

 

[Xrangex]

All that tells me is your tent is air-tight, i've seen alot of grow tents that look like they're getting sucked into themselves because of powerfull fans, it won't do a thing to your plants but yeah if you want it to stop get yourself a speed controler

 

[josh.r]

negative pressure will pull the panda film from the wall and im left with pillow top walls and floor. looks like a moon walk

 

[josh.r]

trying not to vent funk air in to the basement

 

[topfuel29]

How is it even possible to have positive pressure in your system? You have 1 intake and 3 exhaust fans. Your room should have negative pressure. Are you sure your 3 exhaust fans are exhaust?

 

[josh.r]

1 fan on the filter connected to 2 hoods, at the turn 2nd fan, after 2 more hoods last fan exausting outside the house. all on 6in ducting

 

[topfuel29]

1 fan on the filter connected to 2 hoods, at the turn 2nd fan, after 2 more hoods last fan exausting outside the house. all on 6in ducting

Confusing... So you only have 1 exhaust fan? It doesn't matter, you should have more exhaust fans than intake fans. Sometimes if you can pull enough CFM with the exhaust fans no intake fan is needed. Just the vacuum of the exhaust fans will be enough to create a negative pressure environment.

 

[josh.r]

charcoal filter=fan===hood=hood==fan==hood=hood===fan======basement window

 

[josh.r]

just want to know if having pressure in the room is ok for the plants

 

[AZPsyclops]

I can't see it affecting th plants in any way.
Might be tough on odor control though.

 

[Rancho Cucamonga]

Sounds as if your lights heat are being exhausted but the grow room air is not. You want negative pressure, not positive. You'd want your door sucking in, not out. Get a exhaust fan for the actual room in addition to the lights.