minify the papr fanbox for roomba filters

[mmroden]

It may be possible to create a smaller fanbox with two roomba filters rather than the larger germ guardian. Would be a radical design change, but may be worth it from a smaller profile perspective.

[mmroden]

Roomba filters did not pass n95 testing, so closing this issue. On and off-brand filters were tested directly, and none of them performed as needed to justify creating a fanbox.