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the thread title and question is kind of misleading.. I thought it was about pushing air through a scrubber rather than pulling.. But the question is about how to make a filter? tons of DIY threads here and all over the web. Just google "DIY carbon filter"
There are a milloon DIY builds here, and every other MJ board. I made a fast easy one with a piece of 6" thin walled PVC and two pieces of screen. This one was a blow through type scrubber that my blower mounted directly to after sucking the gonjad air from my cabnet.
Screened the end , 10" of activated carbon packed in then a circle of plywood with a 5 1/4" hole in the center and screen stapled/glued in place, that fit the ID of the pipe. As simple as any I have ever seen and worked great. Think the paper towel/fabric softner stealth toke filter, samey same...but bigger.