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?
Needs the grid
Note: Cost, carbon and footprint are broad judgements against comparable building approaches, not measured figures.
A small extractor or vent placed right where smells and steam are made, above the cooker and in the bathroom. It removes them at the source before they spread through the house. Rooms stay fresher and drier with less air moved overall.
The only option catalogued for this need so far, so there is nothing to compare it against.
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.