negative pressure, BAD?

[driska]

hey!
i have a question about n. preasure!
in my tent i have a bit to strong out fan, for intake i have one not so powerful but it get air straight from outside. So i wander if is mybe to low oxygen for flower or not, beacuse when i close the tent the vaccum pull it togetther?
Thanks!

 

[Brother Bear]

That's how it's supposed to work Without negative pressure you cannot be sure all the air is going through your scrubber

 

[driska]

thanks bro!
so no problem i was thinkink the too much negative preasure can dry the plants
thanks again!

 

[Paul_Revere]

If your exhaust fan is to strong and your intake fan is to weak, just eliminate one and only use the exhaust fan. It should be strong enough to pull air through your intake hole and not use the intake fan. What cfm is the exhaust fan?

 

[Brother Bear]

Good point on the intake fan, i missed reading that somehow

 

[driska]

i use this one for outtake and 200mh for intake !!!( this is not promotion for web site!!!)
http://www.thegrowersshop.co.uk/vk-200-run---in-line-fan-cw-speed--temp-control---8-dia-595-p.asp

I dont fully understand what do you think "just eliminate one and only use the exhaust fan", mybe is better pull air in without intake fan?
i put intake fan short time ago and is better! with temp specialy
So i dont have to worry right?

 

[el dub]

No worries, mate. (unless you hear a knocking on the door....)

lw

 

[cyber echo]

Eh.. Why do you need intake fans again ?
You can use passive intake if your fan is strong and just regulate the intake area for negative pressure (total intake area = 2x-4x exhaust area)..

As for negative pressure, all it means is that if there are any openings in the room, the direction of air moving through them is inwards into the room, meaning NO odor can leak whatsoever, except from the exhaust ofc, where you'd have your filter.

So no negative pressure is not a bad thing, it is actually essential

 

[Rjstoner]

exactly

 

[driska]

Eh.. Why do you need intake fans again ?

Got you! but i need beacuse if i dont have it is temperature higher! intake fan youst help air comming from outside witch is a bit far from tent

 

[Hundred Gram Oz]

Just as long as it's not too much of a difference then don't worry, negative pressure = zero smell, positive pressure = stinking your house out

 

[McTore]

Hey dude

If the temps are better with your intake fan then keep it! As long as you still have negative pressure then NO WORRIES!

Good luck

 

[supermanlives]

neg pressure= good

 

[whatsupdoc]

Step 1: Scrap that intake fan.