Looking at the last open wall space in the shop and needing additional bench space for some new tools I began to covet the space that the world's largest cat box occupied. The cat box is actually a small cement mixing bin that I prefer to the smaller commercial ones, I learned a few years ago to put a frame around it with wheels so I could move and clean around it.
Note the filter taped to the 20" box fan, eliminates breathing the litter dust while scooping.
The bench has to be on wheels to access the crawl space door behind it.