Standard convenience appliance; adds an AC or DC electrical load. Its inlet valve is designed for a pressurised supply, so it needs either a mains connection or an on-site pump upstream. A gravity feed alone will not fill it reliably.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
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.