I did a lot of research on this. Components to make, the type of carbon, how long it lasts, blah.

It is cheaper, the first time around to buy a commercial carbon filter. The cost is the carbon.

Now, carbon can be reactivated by reheating to over 400 for several hours. I hope to be able (and it looks like I can) when this one needs changing to disassemble and recycle the carbon and put it back together.

For now, it works, cuts down on noise too
WashougalWonder Reviewed by WashougalWonder on . Facts to build DIY Carbon filter Well I have been all over the internet looking, got some good ideas, but not able to find any data (other than the below quote) to determine sizes for CFM. Well my fan is 750 cfm vortex. My calcs using the above formula show a length of 32 inches. I question if that is enough without blocking air flow. Sure could use some info from a person that knows this stuff. I am figuring an inside diameter of 8" and outside diameter of 10"....will that be enough to scrub the most of the odor Rating: 5