Cools air via water evaporation; effectiveness depends on low ambient humidity, a real limitation in Normandy's oceanic climate, flagged rather than assumed to work well here.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
Low-humidity climate for real effectiveness, flagged elsewhere as a limitation for Normandy's oceanic climate
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.