Article R1331-56 of the French Public Health Code
In bedrooms, dormitories or other rooms intended for sleeping in premises used for collective accommodation occupied by more than five people: 1° The smallest dimension on the floor is at least 2 metres for single rooms and 2.20 metres for other rooms; 2° The floor area is at least 5 square metres per person; 3° The air volume is at least equal to 12 cubic metres per person.