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 MJ 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, 826 views)
	screen.jpg (127.4 KB, 820 views)
	scrubber_vent.jpg (68.1 KB, 1648 views)

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2 Lbs...2 x 4 Aerohttp://www.rollitup.org/do-yourself/...2-lbs-2-x.html

Sorry, items at Lowes:

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

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2 Lbs...2 x 4 Aerohttp://www.rollitup.org/do-yourself/...2-lbs-2-x.html

very nice...

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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2 Lbs...2 x 4 Aerohttp://www.rollitup.org/do-yourself/...2-lbs-2-x.html

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 MJ 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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2 Lbs...2 x 4 Aerohttp://www.rollitup.org/do-yourself/...2-lbs-2-x.html

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 MJ 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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2 Lbs...2 x 4 Aerohttp://www.rollitup.org/do-yourself/...2-lbs-2-x.html