posative vs negative pressure in grow tents?

[Pi2]

I know the thread is old but that may help...

I know the thread is old but that may help...

Hi,

"(...)The result is an astounding 30% more growth than conventional greenhouses."

http://airstreaminnovations.com/a-positive-pressure-future-for-agriculture/

 

[St. Phatty]

Ventilation for the plants is priority #1

if smell is not a big concern.

E.g. healthy intake fan, healthy exhaust fan, CO2 supplementation.

and Oscillating fans giving the plants a massage.


When the time comes, if the intake and exhaust fans are equal, just adding a second exhaust fan will make it a negative pressure room.

 

[Drewsif]

Forced air intake is over engineering. We're talking 6" fans here, not wind tunnels.