Negative air presser or fresh air? smell is not an isssue

[sickstoner]

should i just suck air out of my new grow room or suck and blow air in the neg presser is nice but fresh air has co2 and plants love fresh air? i would still have neg presser but it would be more with no intake what do you guys think? smell is not an issue! and i guess neg air resser is best to control smell. i dunno

 

[sickstoner]

bump no one? bump.....

 

[watercooled@]

There is no need to supplement your intake with another fan. Just make sure there is a vent into the room from outside the building.

 

[sickstoner]

There is no need to supplement your intake with another fan. Just make sure there is a vent into the room from outside the building.

true thanks but blowing in cool air will help with temps too no? or will it pulling in be enough?

 

[stonesour]

Negative pressure is the best route for everything. It will draw the air in from the rest of the house/apartment including co2 that is in the air. Plus you will have little to no smell depending on how much your pulling from the room and where its exiting. I have 4 plants that were 3 weeks into flower and in the next room I had my in-laws stay for two weeks and my father in-law is a 30 year retired shariff. They didnt notice anything because I was pulling such a hard negative pressure.... just my 2 cents. As soon as you add a second fan for intake it messes everything up.

 

[sickstoner]

Negative pressure is the best route for everything. It will draw the air in from the rest of the house/apartment including co2 that is in the air. Plus you will have little to no smell depending on how much your pulling from the room and where its exiting. I have 4 plants that were 3 weeks into flower and in the next room I had my in-laws stay for two weeks and my father in-law is a 30 year retired shariff. They didnt notice anything because I was pulling such a hard negative pressure.... just my 2 cents. As soon as you add a second fan for intake it messes everything up.

its an attic grow outside air is hott

 

[BigBudBalls]

I prefer positive pressure. Gives more molecules in a given area. (=more CO2
(but that leads to smell issues, which the OP said wasn't an issue)