Cascadian
Well-Known Member
The motivation for building this is I needed something fast, easy to build and cheap that would work. I have several plants in veg that are really starting to stink especially the purple kush and purple diesel. The ONA was just masking it and a discerning nose would know what it was instantly.
I built this with 3 items (if you include the duct tape) and it took about 20 minutes to make with just a utility knife and some scissors.
1. Cardboard box anywhere from 10" square up to 12" and anything in between (I used a 10"x12") should be free
2. Honeywell activated carbon prefilter (universal replacement pre-filter) 48" x 16" (got the idea for using this filter from another diy filter thread) $17.96 at HD. It is near the hepa filters etc usually near the lighting section.
3. Duct tape
The filter comes with a crease down the middle so I just cut it along that line to get 2 48" x 8" sections. Next I layed the filter across the box and marked off the 8" width with a pen. I cut about 1/4" inside this line to give the filter something to seat to. Then just cut about 3/4" out from each corner of the box to make a square opening on each side. 2 sides have folding flaps and will have to be cut separately with scissors. Not shown in the picture is that I reinforced the "pillars" with some duct tape.
Then lay the filter over the opening and start duct taping it to the box, I overlapped the filter by about 1/2" - 3/4". Continue winding it around the box taping it all the way around. With my box I wound it around over 2 times making a double thick filter with a lot of surface area.
Make sure all the seems are extra secure / airtight and cut a hole for the fan you will be using at the top. I used a 100cfm duct booster fan and it works great.
The smell is completely gone and it is just sitting in the room as a scrubber, you have to open the door to smell anything at all. Some may take issue with the use of cardboard but it works and is more sturdy than I thought it would be. I think the large surface area really helps this filter work better.
HD also sells a 4" duct booster fan that looked identical to mine for $20.
Also, not pictured I wrapped a towel around the fan and made about a 4" cone of towel above the opening of the fan to act as a silencer using some duct tape. It is very quiet, the box also does a good job muffling the sound.
Sorry I didn't take more pics but it is pretty self explanatory.
Hope this helps someone, just trying to give back a bit. I have received a lot of help from this site
Cascadian
I built this with 3 items (if you include the duct tape) and it took about 20 minutes to make with just a utility knife and some scissors.
1. Cardboard box anywhere from 10" square up to 12" and anything in between (I used a 10"x12") should be free
2. Honeywell activated carbon prefilter (universal replacement pre-filter) 48" x 16" (got the idea for using this filter from another diy filter thread) $17.96 at HD. It is near the hepa filters etc usually near the lighting section.
3. Duct tape
The filter comes with a crease down the middle so I just cut it along that line to get 2 48" x 8" sections. Next I layed the filter across the box and marked off the 8" width with a pen. I cut about 1/4" inside this line to give the filter something to seat to. Then just cut about 3/4" out from each corner of the box to make a square opening on each side. 2 sides have folding flaps and will have to be cut separately with scissors. Not shown in the picture is that I reinforced the "pillars" with some duct tape.
Then lay the filter over the opening and start duct taping it to the box, I overlapped the filter by about 1/2" - 3/4". Continue winding it around the box taping it all the way around. With my box I wound it around over 2 times making a double thick filter with a lot of surface area.
Make sure all the seems are extra secure / airtight and cut a hole for the fan you will be using at the top. I used a 100cfm duct booster fan and it works great.
The smell is completely gone and it is just sitting in the room as a scrubber, you have to open the door to smell anything at all. Some may take issue with the use of cardboard but it works and is more sturdy than I thought it would be. I think the large surface area really helps this filter work better.
HD also sells a 4" duct booster fan that looked identical to mine for $20.
Also, not pictured I wrapped a towel around the fan and made about a 4" cone of towel above the opening of the fan to act as a silencer using some duct tape. It is very quiet, the box also does a good job muffling the sound.
Sorry I didn't take more pics but it is pretty self explanatory.
Hope this helps someone, just trying to give back a bit. I have received a lot of help from this site
Cascadian
