Brings daylight deeper into a room than a standard wall window, without added solar heat gain at eye level.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
A design allowing a raised roof section or elevated window band
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.