The time to upgrade my space with a carbon filter has been way overdue. The ones at the store are not only $$$ they are non refillable and the smallest one is overkill for my needs and space requirments...
I want to thank Durban Poison for his thread. Formulas and other tidbits can be found here http://www.icmag.com/ic/showthread.php?t=31679&page=1&pp=15&highlight=diy+filter
I decided to build the 4 inch core using a 250 CFM rated DC blower fan. In theory, a room must completely exchange air every 3-5 minutes for the carbon scrubber to be effective. Durban also has a formula for figuring how much square footage you will be exchanging.
Using Durbans Formula, I determined that i need a 15 inch long inner core to match the 250CFM fan i intended on using!
Items required
6 inch end cap
4 inch end cap
Galvanised woven Hardware cloth
6 inch to 5 inch reducer
5 inch to 4 inch(small) reducer
5 inch to 4 inch reducer
pantyhose(stockings)
2 4 inch pipe clamps
2 6 inch pipe clamps
pair of tin snips(straite cut)
The first step is to make your inner core using the end cap to help determine diameter. Rather then using wire to fasten i cut the mesh so that i had a bunch of loose ends. I took these and bent each one around the overlap. This takes time, took me over 2 hours to complete, but it resulted in a perfect cylinder with no uneven spots.It is very strong as well, no flexing and the nylon will NOT get hung up on it.
I used a 5 to 4 inch (small) reducer to mount the other side of the innercore. The reason is is that it slides perfectly inside the 6-5 inch reducer, and is VERY sturdy. you can see the two of them here.
Once you have fit the Nylon over the core, its time to get crackin on the 6 inch outter shell. This is built the exact same way as the 4 inch, again to get it perfect takes about 2 hours to complete... That is with one set of hands. The mesh is not the easiest stuff to work with, patience pays off though..
here is the outter shell completed.
I choose to order my activated carbon online, i bought enough to refill my filter at least 4 times, plus it came with some fancy filter media as well I may use this for the outter shell.. I am into this filter can for about 100$ including refills and the 250cfm blower fan on route!
Will update again when the rest of my supplies come in!!!!
I want to thank Durban Poison for his thread. Formulas and other tidbits can be found here http://www.icmag.com/ic/showthread.php?t=31679&page=1&pp=15&highlight=diy+filter
I decided to build the 4 inch core using a 250 CFM rated DC blower fan. In theory, a room must completely exchange air every 3-5 minutes for the carbon scrubber to be effective. Durban also has a formula for figuring how much square footage you will be exchanging.
Using Durbans Formula, I determined that i need a 15 inch long inner core to match the 250CFM fan i intended on using!
Items required
6 inch end cap
4 inch end cap
Galvanised woven Hardware cloth
6 inch to 5 inch reducer
5 inch to 4 inch(small) reducer
5 inch to 4 inch reducer
pantyhose(stockings)
2 4 inch pipe clamps
2 6 inch pipe clamps
pair of tin snips(straite cut)
The first step is to make your inner core using the end cap to help determine diameter. Rather then using wire to fasten i cut the mesh so that i had a bunch of loose ends. I took these and bent each one around the overlap. This takes time, took me over 2 hours to complete, but it resulted in a perfect cylinder with no uneven spots.It is very strong as well, no flexing and the nylon will NOT get hung up on it.
I used a 5 to 4 inch (small) reducer to mount the other side of the innercore. The reason is is that it slides perfectly inside the 6-5 inch reducer, and is VERY sturdy. you can see the two of them here.
Once you have fit the Nylon over the core, its time to get crackin on the 6 inch outter shell. This is built the exact same way as the 4 inch, again to get it perfect takes about 2 hours to complete... That is with one set of hands. The mesh is not the easiest stuff to work with, patience pays off though..
here is the outter shell completed.
I choose to order my activated carbon online, i bought enough to refill my filter at least 4 times, plus it came with some fancy filter media as well I may use this for the outter shell.. I am into this filter can for about 100$ including refills and the 250cfm blower fan on route!
Will update again when the rest of my supplies come in!!!!
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