Having two kitty-kats hanging around is a great pleasure. The downside is cat dander and litter dust everywhere. Fortunately, this can be managed with the use of good quality air cleaner such as the Honeywell model 50100 which has a two-stage HEPA filter.
I installed the 50100 in the laundry room where the litter boxes are located. It sucks in plenty of dust. But since it runs 24-7, it contributes to my electricity bill. Also, they have to shovel in more coal down at the power plant. Well, there is no need to run this filter while cats are sleeping, so filter automation is the next step.Photos with explanation can be viewed on the (removed) Feline Motion Sensor.page.