Printer Enclosure Air Filter

This is a stand alone air filter, redesigned from the ground up but based on the original good ideas presented in "80mm/40mm Fan Carbon Filter v2", thing # 2172962.

This is meant to recirculate/filter the air within a printer's enclosure, not to exhaust it out of the enclosure, to help preserve the heat within the cabinet and to prevent pulling a cold draft of air across the heated build plate.

There are two versions of the filter top which mate to either an 80mm fan, or a 92mm fan. Anything less just doesn't seem to pull enough air to be functional as a filter. Both of those sizes are standard sized PC fans readily available in 12V and 24V.

I up-sized the space inside the box from its predecessor, creating a filter box that is taller and wider to accept more media. The interior is 90 x 90 x 40 (WxLxH), plus the headspace leading to the fan.

The filter box mates to the base via pegs/holes. I undersized the holes slightly, so that if you drill them out with a 9/64 bit the pegs sh