After reading about many DIY projects I came up with this inexpensive spin on a great design. I would classify it as a medium duty scrubber. It eliminated the odor from my room, but it was not very smelly to begin with. I am growing mostly Grapefruit Haze, and it has more of a fruity aroma. I have one Sour Diesel plant that I know will be stinky, soon. I say medium duty because after eliminating the marijuana odor, I decided to really test it out. I had a friend spray some body spray in the air inside the grow room. I was in the next room, where the grow room vents to. I could smell the body spray, but just lightly. Maybe a higher quality (I got the cheap one) carbon would have been better. Ideas?

Items needed (pictures below):

6/4 inch duct cap
6/4 inch duct starter collar (or other adaptor)
aluminum screen or welded steel mesh
activated carbon prefilter
duct tape


Procedure:

I began by constructing my screen tube. If you use screen it must be sturdy, so I folded the piece of screen I cut in half. I will probably use the mesh next time, but screen was all I could find. I cut a strip app. 36x24 inches, folded it in half the long way, and wrapped it into a 6 inch tube, 18 inches long. I used a little duct tape on the ends to hold it temporarily. I slid the duct cap into one end of the screen tube, and the collar into the other end, and duct taped them securely into place. Next, I took the sheet of carbon filter and wrapped it around the outer shell of the screen tube. I secured it in place with the velcro strips which came with the filter. And, Voila!

Suggestions on improvement will be greatly appreciated.

Attached Images

	prefilter.jpg (67.3 KB, 0 views)
	screen.jpg (127.4 KB, 0 views)
	scrubber_vent.jpg (68.1 KB, 0 views)

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Sorry, items at Lowes:

filter - $10
screening - $5
duct cap - $4
duct collar - $4
total - $23

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very nice...

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DR. VonDankenstine

You can also a few layers of cotton and add carbon powder.

definitly going to have to give this a try.. those inline fan/carbon filter combos are crazy expensive.. big ups

true. i was trying to re-design the ones i have seen that use carbon rocks and pantyhose, in attempts to lower the cost. foothill filters sells a 4 x 12 for $43, and the DIY projects i have seen cost that much, so i was attempting to beat that. this design was actually created by someone else previously. btw you are talking about the activated carbon rocks, right?

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how well does it work?

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Mushroom Grow Journal!

"I would classify it as a medium duty scrubber. It eliminated the odor from my room, but it was not very smelly to begin with. I am growing mostly Grapefruit Haze, and it has more of a fruity aroma. I have one Sour Diesel plant that I know will be stinky, soon. I say medium duty because after eliminating the marijuana odor, I decided to really test it out. I had a friend spray some body spray in the air inside the grow room. I was in the next room, where the grow room vents to. I could smell the body spray, but just lightly."

Got rid of the SD, only have Grpfrt Hz and G13. No smell.

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I made one very similar to that using the exact same carbon filter material. My 3 plants were vegging and smelled a little but not too much. The filter seemed to work fine for a bit but after a week or so it lost all effectiveness. I attribute the failure to at least these factors:

--There's just not enough carbon there (main problem)
--I was sucking through it with a 6" fan and the air may have been passing through the filter material too quickly
--My plants got smellier (still vegging though) and overwhelmed the filter's abilities

IMO, the filter I made was a light duty stop-gap measure at best and a waste of resources at worst. Escaping marijuana smell should not be trifled with.

While I hastily constructed a new filter of a completely different design using granulated carbon, I made do by placing dryer sheets on the outside of the carbon blanket filter. The suction (barely) held them in place. They would work for maybe half a day before needing new dryer sheets.

$0.02

right. i attribute my success with this lightweight to the fact that grapefruit haze is not loud or smelly. the aroma is fruity. i have a couple of G13 plants, and the smell like some spice or something. so, i don't have a smell problem. if i turn the fan off for awhile the whole house smells like fruit on a warm day (fermenting fruit?). i have a sour diesel vegging, and this stuff gets funky, so i will probably opt for an odor sock from NGW. i will do-it-myself before i shell out over a buck plus another 50 cents for shipping.

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