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Thread: Homemade Carbon Filter

  1. #1
    420 Member POTential's Avatar
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    Homemade Carbon Filter

    I want to try and build a homemade carbon filter using high cfm computer fans. I've seen them online that push over 200cfms and I wondering if that would be enough for a smaller filter. I'm figuring that instead of activated carbon I could use replacement carbon filters that are sheet like these Replacement Filters The filter would be only for one plant in flower, with the room at 1'6"x1'8"x3' and I'd be ok with changing it for each grow as I'm sure they don't 'last as long as activated carbon.

    You guys think it will work?

  2. #2
    Cannabis Connoisseur Boss's Avatar
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    Re: Homemade Carbon Filter

    Really hard to say. I tried it all, and ended up with a 12" refillable carbon filter for 50 bucks.

  3. #3
    420 Member POTential's Avatar
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    Re: Homemade Carbon Filter

    ^ u got a picture to give me an idea of what your talking about? Whats the cfm for it and is it very loud?

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    420 Member POTential's Avatar
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    Re: Homemade Carbon Filter

    I found some pics myself. I'm still curious though as to what cfm yours is and how loud is while running? It would be in a bedroom.

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    Re: Homemade Carbon Filter

    Right now it's just the one plant so I am running a 75 cfm bathroom fan. I didn't feel the need for 250 cfm for one plant :-)

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    420 Member POTential's Avatar
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    Re: Homemade Carbon Filter

    You have your filter hooked up to a bathroom exhaust fan? I was going to use a 100cfm computer fan. Ain't that bathroom fan a little big and loud?

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    Cannabis Connoisseur Boss's Avatar
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    Re: Homemade Carbon Filter



    It's not loud at all. The 12" filter is on the other side of the wall.
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    Fallen Cannabis Warrior Medical Marijuana's Avatar
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    Re: Homemade Carbon Filter

    It should work ok in a horizontal position.

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    Re: Homemade Carbon Filter

    I have a 4lb carbon filter and it works awesome. Maybe the carbon was for water and not for air.

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    Re: Homemade Carbon Filter

    Our sponsors carry very good filters.

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    420 Member POTential's Avatar
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    Re: Homemade Carbon Filter

    Quote Originally Posted by green acres View Post
    i made a filter copied from someone on this site,he said it cost 50 buck`s so i tried, by the time i paid for the charcoal, that is imposible to find in vancouver it cost me almost a hundred buck`s. 10bucks a pound at pet stores put 5 pounds and its not enough it only lasted about 2 weeks in veg and i can smell it through the filter.is thet filter sheet any good and would i need to double or triple up the filter,got about a 200 cfm fan.
    I haven't had time to try and build one yet but after some more research I've decided to take boss's advice and use refillable carbon.

    I'm now considering building both to see if it would work. If those sheets aren't too expensive I'll give it a shot.

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    Re: Homemade Carbon Filter

    how to make a reliable cf:want to know how send me a message!!!!!

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    Re: Homemade Carbon Filter

    ^can you post a tutorial?

  14. #14
    420 Member mistergreen60's Avatar
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    Re: Homemade Carbon Filter

    I also made a home-made filter from plans I found here over a year ago. I had a hard time getting cheap carbon, so I decided to try using crystal kitty litter. I've had this filter over three small plants from veg to flower 4 times through now and I still can't smell anything until I open the door of the cabinet.

    The filter was mostly made of venting duct pieces, chicken wire, and pantyhose stretched over the whole assembly. I'll admit though, I priced a similar size filter and it was only $45. I spent about $55 in supplies. But it works well.

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    Re: Homemade Carbon Filter

    Quote Originally Posted by Smokin Moose View Post
    ^can you post a tutorial?
    ok this is for MOOSE

    things needed:
    2footx3foot of chicken wire
    2x cooker hood crbon filter pads from any good hardware store
    grease filter paper usually comes in a kit with the filter pads
    duct tape
    large needle and thread

    ok first off you are going to decide on the size you want!!?

    then you are going to gut the chicken wire into a square that masures 2 x 2 feet
    now roll the cicken wire into a cylinder the size of your fan eg 100mm=4inch
    then tie or bend over the ends of the wire locking it in place,if you like you can thread the edge
    now roll the carbon filter pads around the wire tubeand use the needle and thread to sew it up

    ok now u have a wire mesh tube with the carbon pads wraped around it

    take the other pad and cut a circle out of it
    this will be used as the end of the tube sew it up as before
    ok now use the tape to wrap around the end of the tube that will be connected to your fan which will give a nice seel

    ok now take the grease filter paper and do the same thing the paper will act as the dust filter and the carbon will remove odors
    after u have applied the paper u will want to use duct tape to seel the edges of all joins.!!!!

    easy ay and will only cost around £10-15 hope this helps ya all!!!!!!!!

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