People living in very small spaces can still get great water. The installation into Drew's parent's van, they are using a 1 Micron sediment filter followed by a 0.5 micron carbon filter, then the D-UC ceramic/carbon filter it series. This effectively combines our Essential System with the Ultrapure Premium under sink system. The ceramic filter filters down to a very fine level, 0.2 microns, allowing it to remove bacteria, fluoride, arsenic, lead, taste/odor, chemicals, and much more. But because of the fine filtration, the flow will be about 1 gallon/minute, so it is useful for a drinking water system or filling the tank, but not to pressurize your shower.