Passive Intake?

So if i have a passive intake can it be on the same wall as the exhaust? Because it's a closet and i can make holes only in the back?

attach some ducting on the inside and then over to the other side of the cupboard so that the air is being drawn across the closet and yes it would work fine.

If you have a passive intake, you'll need a good exhaust fan to pull the air.

If you don't have anything pushing or pulling, you're gonna have some stagnate air.

This does not include of course your fan for in room air circulation.

Sure mine is I have the exhaust at the top of the closet and the holes at the bottom. Just with a passive intake you need to have about two times the hole size as the exhaust.

22.5 Cubic feet room needs 22.5CFM to exchange the air once a minute right? so i'm aiming atleast 3x that?

What are your dimensions of your closet?

LxWxH = Volume

Once you have this number if you plan on adding a carbon filter to the system aswell you need to add 20% for the reduced efficiency of the carbon filter attached to the fan.

Are you using CFL's or HID's?

A passive intake should ideally be located at the opposite end to your exhaust to allow good airflow movement through your room. BUT as Tip Top Toker has suggested you can use ducting to direct the passive intake wherever you need it to be. This is what i do in my flowering Closet.


J

varscience21 said:

Sure mine is I have the exhaust at the top of the closet and the holes at the bottom. Just with a passive intake you need to have about two times the hole size as the exhaust.

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that is right. i'm thinkin that the wall where there will be 2 holes if it's just another room, then you will be circulating the same air