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.
No build tutorial recorded yet.
Compare building and maintaining complexity, as well as efficiency where possible.
| Solution | Build skill | Upkeep burden | Efficiency |
|---|---|---|---|
| Dishwasher | None | 6 | #1 |
| Two-basin hand dishwashing | None | 0 | #2 |
Build skill and upkeep burden are proxies (lower burden = simpler to maintain); the efficiency column is this sub-function’s ranking, 1 = best. “N/A” where an axis isn’t rated here.
No sizing or quantities: how much a technique yields, and how much a household needs, both depend on the build and the people, so the catalogue compares options rather than dimensioning them. It carries no bill of materials and no build sequence, and it is written for an oceanic, clay-soil climate (Normandy, France). Regulatory notes are indicative and need confirming locally.