Lowtech Graph lists low-tech options for every need of a home. Here you can compare them, find tutorials to build them, and link them together into a circular system. Why low-tech?
Passive
One of 2 ways to meet this need. Cost, carbon, footprint and rankings are relative to other solutions for the same need, not absolute.
A sink or two basins, and hot water from somewhere. Nothing is fixed to the building, so it works anywhere
Washing in a filled basin and rinsing in a second, rather than under a running tap. It needs no appliance, no plumbing and no electricity, and the rinse water is clean enough to water a garden. Its weakness is that it is a habit rather than a device: the same research that measures a filled sink at its best also measures a running tap at more than ten times that, and nothing about the method enforces itself.
Nothing separate is built here: this is a choice about how the home is designed or used.
Levels are relative to the other options for this need, not absolute. Fewer dots is lighter.
We don’t list sizing or quantities, as the yield of each technique depends on the quality of its build. The catalogue compares options but doesn’t dimension them. Regulatory notes are indicative, with a French example, and need to be confirmed locally.