The Grobo is completely self-contained, which means you don't have to vent anything outdoors.


The generation 1 grow box has two intake fans and one exhaust (crossflow) fan. Those fans circulate all the air through the unit. 

The generation 2 grow box has one moveable fan on the inside of the unit and one exhaust (crossflow fan). 


Still have questions? Please see HERE for how to contact us.