Inline carbon filters...extractor placement

futurebanjo

futurebanjo

Well-Known Member
Hi all, I just got an inline carbon filter...does anyone know when attaching the exractor fan to the ducting...

Is it better for the fan to push air through the filter, or pull air through from the other end?

I'm guesing pull, as that would be the same orientation as a regular 'one ended' carbon filter?

Im guessing the fan works much more efficiently one way or the other?
 
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futurebanjo

futurebanjo

Well-Known Member
The bit that's also throwing be off, is the airflow direction sticker on the inline filter seems to be pointing in the opposite direction for the internal bit, compared to the regular filter?

filter.png
 
DarkWeb

DarkWeb

Well-Known Member
When it comes to moving air, it's best to use the fan to pull. It has to do with compressing air. When a fan pushes air down a duct, it compresses the air and creates resistance. When you have the fan at the end of a run, pulling air you don't get that.
 
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1212ham

Well-Known Member
futurebanjo said:
Hi all, I just got an inline carbon filter...does anyone know when attaching the exractor fan to the ducting...

Is it better for the fan to push air through the filter, or pull air through from the other end?

I'm guesing pull, as that would be the same orientation as a regular 'one ended' carbon filter?

Im guessing the fan works much more efficiently one way or the other?
Click to expand...
The fan will stay clean inside if you pull through the filter. Efficiency isn't really an issue, the fans get it done either way.
 
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futurebanjo

futurebanjo

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Thanks,

I've not set it up yet, I think I'll set it up in a pull through the filter configuration...
 
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DarkWeb

DarkWeb

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1212ham said:
That's true, but the air flows through the inner surface, the outer surface and everything in between.
Click to expand...
It's surface area. A smaller surface will plug before a larger one.
I'm just using this picture as an example of what I'm saying.

The white sock is on the outside to pre-filter the possible dust and other things floating in the air that would clog the finer porosity filter through the carbon.
 
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1212ham

Well-Known Member
DarkWeb said:
It's surface area. A smaller surface will plug before a larger one.
I'm just using this picture as an example of what I'm saying.

The white sock is on the outside to pre-filter the possible dust and other things floating in the air that would clog the finer porosity filter through the carbon.
Click to expand...
Definitely, I just wasn't sure what you were getting at. My "inline" filter is just a can filter in a box, I can open the box, remove the pre-filter and wash it. It's also a lot cheaper than an inline that doesn't even have a pre-filter.
 
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futurebanjo

futurebanjo

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Mines not like that, its like an inner filter in a can..

It doen't have a fabric/cotton pre-filter, from what I can tell.
 

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Billytheluther

Billytheluther

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Ive seen way better results pulling air through the filter than pushing it out.. i do the opposite though to save room in the tent..l i only do this when not venting out though.. if venting outside filter goes in the tent air goes outside.. just depends on how you want to go about it and what you want your setup to be..
you’re going to have a slight stank if running it like i do..( nothing drastic really, if you have the privacy)
If you dont mind keeping a window open throughout the prosses ( or drilling a hole somewhere ) then i would do that..
 
amneziaHaze

amneziaHaze

Well-Known Member
You put the fan on top of the box soo it takes warm air and you push the air in to the carbon filter soo all the stinky box air gets cleaned or put the filter inside the box and pull from it.allsoo remember every meter of ducting will make your fan weaker.thats why i put my fan directly on the carbon filter.

You can find formulas for how much you need to exchange air in the box it has cables roomsize power... somewhere on the forum you can find it
 
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