My $3 Carbon Filter

hotrodharley

hotrodharley

Well-Known Member
SativaMe@420 said:
I was going to use one of these 6" engine intake air filters, only $25 shipped on ebay, put a nylon inside, fill it with carbon, tie the end of the nylon and attach it to the inline fan, I would think you would get more life and be able to remove more odor out of this method and the only thing you would have to replace is the carbon, do you think the OP's idea would work better?
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I think that dog would hunt. The problem (you can overcome) is how much to be effective without damping air flow too much? In this case the slower fans might work best rather than have backwash and turbulence. That is true with any fan (or turbo or supercharger) application. Make your connections secure after you fill with carbon. You know loose packed will settle from the RPM at some point so lightly packing is going to be needed or lose the effect by creating an open headspace eventually. Then fire it up and do the smoke test. If it can't evacuate smoke without backflow you need to think possibly a slower fan or a retail carbon filter. Good luck and +rep for being a reasonable thinker whether it ends up working or not.

I'd use fine metal screen instead of a nylon bag. At Lowes but make sure it isn't that vinyl shit they sell. The metal will allow more stuffing and packing before it begins to deform your paper.
 
dbkick

dbkick

Well-Known Member
I'm wondering how many of these diy filters are gonna backfire and entirely fuck up someones grow , it wouldn't be the first time I've heard the story of the diy filter that busted a seam and distributed all the carbon on someones buds.
 
SativaMe@420

SativaMe@420

Well-Known Member
birdmananyweather said:
genius!!!! why didnt i think of that, i have like 3 full cold air intakes just lyin around!! nice find:weed:
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Yea I actually have a one of these (pic below) but it only has a 4" opening and since I will be using 6" inline fans putting on reducers will really cut into the CFM's. If you do get one make sure the opening is the same size as your inline fan as any time you use reducers it cuts down the CFM's and makes the fan work harder, I imagine that would reduce the life span of the fan also.
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only71

Active Member
Runagi said:
Wow that's awesome! I was thinking about making carbon filters, but I got a question, what do ya do with em now :dunce: Forgive the newbie question, but the carbon has to be wet to be activated right? Err so how do you use them, put them behind a fan or something? Or keep them wet???
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i think the humity will do the trick as it is pulled thru it will absorb it and do its job will check with my father as he works for a carbon mfg (best part is huge gallon jugs of free carbon!!) like teh under hood carbon filter on your stove vent hood that no one ever changes
 
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only71

Active Member
dbkick said:
I'm wondering how many of these diy filters are gonna backfire and entirely fuck up someones grow , it wouldn't be the first time I've heard the story of the diy filter that busted a seam and distributed all the carbon on someones buds.
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you could just pick up teh pellets theyare teh larger then several pot seeds almost 1cm if you cant see a 1 cm object put donw teh pipe your too stoned watch a movie or stare at a plant

lol

never use powered carbon
 
Hupomone

Hupomone

Active Member
Nice idea man.

I noticed there was a debate earlier and discussion about some special type of charcoal you need. Almost any research you can do online about just regular activated carbon/charcoal will show you that they it has tons of tiny air pockets or pores inside that traps the odors in the air, or the bad stuff in water as well, as it passes through. So regular activated carbon works all the same for both air and liquid. They are both required to pass through the carbon. No need for a special type of carbon to trap odors when carbon is carbon.
 
BeastGrow

BeastGrow

Well-Known Member
20" box fan. get a carbon air filter 20x20x1 or get some replacement carbon prefilter... tape to both sides of the box fan. you can find everything at walmart but the carbon prefilters are much cheaper on amazon.
 
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Fondle v Corpse

Member
Okay okay.. quick question. Time is of thee essence. I have 1 stank ass girl bout a foot tall and gonna be flowering in a day or two. She's in the closet and the only ventilation I have is when I open the door lol... can I put a small fan in the closet and sew a big one of these to cover the whole fan ? Since its in closed it'll be forcing the dirty air through constantly.. maybe ???
 
ruffrider

ruffrider

Active Member
Fondle v Corpse said:
Okay okay.. quick question. Time is of thee essence. I have 1 stank ass girl bout a foot tall and gonna be flowering in a day or two. She's in the closet and the only ventilation I have is when I open the door lol... can I put a small fan in the closet and sew a big one of these to cover the whole fan ? Since its in closed it'll be forcing the dirty air through constantly.. maybe ???
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wouldnt even bother with the hassle of making one for 1 plant. Just pick up some ona gel or even those dollar store knock offs.

ONA gel or the knock offs work pretty good used 2 of em at a time before i got my filter to cover the smell of 6 Purp Kush.

Usually get about a month or two use out of them
 
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Fondle v Corpse

Member
Sry don't know much about that.. but this is effen DANK.. what do you do with gel ? can I just spread it on the walls? Nah in all seriousness how can I use it with my setup . I wish I could just cut the effin door n cover the hole with afilter and keep a fan inside. But sadly it would mean my death
 
ruffrider

ruffrider

Active Member
Fondle v Corpse said:
Sry don't know much about that.. but this is effen DANK.. what do you do with gel ? can I just spread it on the walls? Nah in all seriousness how can I use it with my setup . I wish I could just cut the effin door n cover the hole with afilter and keep a fan inside. But sadly it would mean my death
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Lmao thats great but the best way I found to do it was just take the lids off place one in front of your fan as close as you can so it gets spread around then the other just place where ever. I put mine in the middle almost or by the door.
 
ruffrider

ruffrider

Active Member
Or if you have the materials make an ONA Bucket ran that a few times as well.

Check it out how to make one, its fairly easy and straight forward.
http://www.youtube.com/watch?v=3jQv_-hbXok

You don't need the soil moist..You can use just about any fabric freshener (Febreze works the best.. not the air stuff but the actual furniture stuff.) Instead of mixing in soil moist mix in some of the fabric freshener then once a week or so once you notice it starting to get kinda dry, add some more fabric freshener, I used to pour enough so that it almost covered the ona but not quite.

Once you get into it more and have some money saved up I'd suggest a carbon filter for sure tho.
 
ruffrider

ruffrider

Active Member
Fondle v Corpse said:
Thx for the replys. I definitely wasn't as ready as I thought I was.. bit of a learning curve. Everyone's been really helpful tho, thx again !
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Everybody has that learning curve don't sweat it! No problem.. you''ll get there with time. Shit my first few grows were just a closet, 3gal pots, 350watt worth of cfl, PC fan, 3 bag seed and nothing for the smell.
 
Herbicide

Herbicide

Well-Known Member
Im going to adapt this idea and make a small box air has to pass through before leaving the ducting. With the filter on one side and the ducting attached to the other. Going to make it work like a air filter for your house or dryer. Being able to just slide the filter in and out as it needs to be replaced. By taking a dryer filter and cutting out the original filter and making mine fit.

I'll get to work on this soon and tell everyone how it works ;D
 
Roosterado9

Roosterado9

New Member
panhead said:
Here is a way to make carbon filters for less than $3 each,they take about 30 minutes to make & all components & materials can be bought at any meijers store.

Materials needed.

1 4 pack Scotch Brite cloth towels from Meijers............$2

1 Bottle Activated Carbon from Meijers or fish store......$6

1 sewing needle & thread from Meijers........................$2

Total cost for 4 carbon filters...................................$10.

First you start out with the Scotch Brite cloth,its very thin & extremely strong,i find it much stronger than aluminum window screen material,its next to mpossible to tear yet the weave of the material is such that it will not restrict air flow.

Take the Scotch Brite & fold it in half or to a smaller size to fit your needs,like this.



Then take & sew 3 & 1/2 sides of the Scotch Brite closed making a pillow case looking thing,make sure to leave a few inches open to fill the "pillow case",then pour in the Activated Carbod to a little less than half way full & sew up the spot that was left open to pour the carbon in.

Here is the carbon.



Here are 2 finished Carbon Filters.



As for attaching them to what you need to there are several options,there is always duct tape in a pinch but i connect mine using hose clamps from the hardware store,the hose clamps make it easy to take the filter off if needed & is more secure that tape.

These work every bit as good as a $80 carbon filter i bought off of ebay & cost less than $3 each & about 2 hours time to make 4 of them,its not getting any cheaper than that.
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I Think this Odor filter design Borders on Genius! For my 2X4X5 Ft grow tent I use a expensive 4" 200CFM inline Duct Fan. My DIY Carbon filter is from another post on The ultimate odor control thread https://www.rollitup.org/t/2-minute-cheap-easy-carbon-filter-
no-duct-tape.58871/
I will definitely be making some carbon filters from this thread ASAP. [For a smaller DIY Grow Box for AutoFlowers] I just wanted to mention I bought 4lbs Bulk Air Filter Refill Coconut Shell Granular Activated Carbon Charcoal from Ebay for $24. That would fill about 25 of these filters.
http://www.ebay.com/itm/201002362510?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
.
 
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