Yeah the activated carbon filter in my commercial purifier is just a sheet that sits in front of the filter. You can buy one and duct tape it to the DIY solutio

Yeah the activated carbon filter in my commercial purifier is just a sheet that sits in front of the filter. You can buy one and duct tape it to the DIY solution. It has to be vacuumed regularly and eventually replaced. Also there doesn't seem to be any need to worry about sealing the filters as the author's experiments showed, and because the stuff you're filtering is already floating around. It would matter in a vacuum cleaner or some such pollutant-kicking stream.