i've heard you have to heat the carbon in an oven or something to reactivate it... just my supposed 2 cents... might be an IOU... i'll check later though...

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It doesn't look like anyone is answering this thread anymore, but I have a question for this diy project. I hate to be the dumbass asking lame questions but I feel the need for clarity. I could not find the sotch brite towels. I instead bought Handi wipes reusable cloths.They are 19.25 X12 inches. Made 2 out of one cloth. Anyway sewed it up, put the carbon in and keep getting carbon dust coming out of the bags. Do you get this from the scotch brite towels? Or do I need to go get the scotch brite cloths? Just feel if I put this in the intake of my exhaust the dust could f-up my fan. Help would be greatly appreciated.

To date ive answered every question posed to me in this thread.

As long as the handi wipe cloth's are made so the filter will have good air flow i see no problem using them instead of scotch brite cloth.

The carbon i used is not dusty at all,it comes in pellets about the size of a tic tac & has given me no dust problems,i cant say one way or another if carbon dust will fuk the fan up but i would think that carbon dust could possibly cause premature motor failure if it's allowed to build up or the bearings are seeing high levels of the dust.

If in doubt try a different form of carbon or a diffferent filter method,i'd rather switch filter methods than burn a expensive fan out.

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My 4 day $40 bud dryer,http://www.rollitup.org/grow-room-de...ml#post2087235My DIY $3 Carbon filter,http://www.rollitup.org/grow-room-de...on-filter.html

Sorry did not mean to put your integrity in question. Just looked like the post might be drying up.I think you are one of the most helpfull members on these boards. Well right now took one of the bags and held it over a white paper towel and after moving and shaking it around no noticable carbon came out. I then took it and folded it up and gently slid it into my intake on my exhaust fan. Tried to position it to where there was no air passing but through filter. The RPM went down considerably. I had intended to put one on exhaust end of fan but seeing how much reduction I got am going to wait to see how it works. I just have a Dayton 265, do you think I need something bigger?

The whole folding in half thing would concern me if it was my grow op,number one the sheer mass of the filter would decrease flow to the point that much less air would be passing through the carbon & possibly defeat the negative pressure aspect of a filtered room.

My next concern would be that folding them in half would create too much resistance on the fan & make the fan work much harder than it should.

It's hard for me to say weather you need a stronger fan or not,there are so many variables like carbon amounts & installation methods ect that will effect cfm's & filtration,my plan for the filters was for them to go on the outside of either the fan or exhaust duct & to have a 1/2 inch thick layer of carbon for dirty air to be pulled through.

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My 4 day $40 bud dryer,http://www.rollitup.org/grow-room-de...ml#post2087235My DIY $3 Carbon filter,http://www.rollitup.org/grow-room-de...on-filter.html

Thanks for the quick reply! I folded it in half because in your instructions you said fill case half way up with carbon, which I did. If I try to lay or put case up against the vent the carbon falls down to bottom of case and half doesn't filter. I have my vent coming through the floor going 6 feet up in corner of room and 3/4 way up my wall I make a 90 degree angle to pick up heat and smell in grow. Obviously I don't have a grasp on how to mount this to vent. I use a 4" diameter hose. So you put this over the opening and excess of the case is anchored by a dryer hose clamp? Is this how it is supposed to be done. Sorry about being such a pain in the ass! I really want this to work.Thanks

You've got it,thats exactly how im using mine,i filled my bags up roughly half way,maybe a little more,i had a tough moment figuring out how to mount mine to the exhuast without the carbon getting in areas off the bag that were to be clamped around the pipe.

What i did was to take a pipe extension & center it over the filter,then i pushed the carbon out of the areas that were to be clamped then secured the filter with the clamp & attached it to the exhaust pipe,worked a charm,the entire exhaust intake area is covered with carbon & none is in the clamping area.

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My 4 day $40 bud dryer,http://www.rollitup.org/grow-room-de...ml#post2087235My DIY $3 Carbon filter,http://www.rollitup.org/grow-room-de...on-filter.html

Awesome thread, but im still confused...

More pics of complete setups with filter im place would be great

reprep

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so what is that u just pour the activated carbon into the pouch what is it little pellets?
wont u need more than one of those bottles

thats a very small bag.. so probly wont need more than one

I was thinking... what i I had a rubbermaid grow... 32gal
(this isnt mine... stolen from some DIY thread)

-make a tube out of chicken wire.. about 6inches-12inches tall
-place on top of rubbermaid, around top of fan
-duck tape a few of your bags of activated carbon to inside OR outside of chicken wire



What do u guys think

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