Passive intakes

T

theBLiNT

Member

• Jan 26, 2014

• #1

Hi! I have 47x53x120cm grow box.. Using 250W hps and 1x 12 cm PC fan as exhaust...and i dont know how many passive intakes should i make and how big they should be? In my opinion its would be 2x 12 cm holes at the botom and the opposite side of exhaust.. Is it good ? Thanks for help

 

JohnDee

Well-Known Member

• Jan 26, 2014

• #2

Sure, that would be plenty...just make sure they don't leak light.
JD

 

T

theBLiNT

Member

• Jan 26, 2014

• #3

okey and when i will use intake pc fan too? like this https://www.rollitup.org/members/fa...ans-picture792866-2-120mm-pc-fans-intakes.jpg ? its ok?

 

JohnDee

Well-Known Member

• Jan 26, 2014

• #4

Blint,
You asked about passive...which means no fan. If you want to use an intake fan...then you will only need one intake opening.
JD

 

T

theBLiNT

Member

• Jan 26, 2014

• #5

JohnDee said:

Blint,
You asked about passive...which means no fan. If you want to use an intake fan...then you will only need one intake opening.
JD

Click to expand...

Okey sorry and what you think ? Its better passive or fan?

 

JohnDee

Well-Known Member

• Jan 26, 2014

• #6

I've only done large grow rooms and I always used passive intake and a large exhaust fan. You'll have to decide depending on your fan strength.
JD