It shall be possible to ventilate accommodation adequately even when the doors are closed; in addition, communal living quarters shall receive adequate daylight and, as far as possible, provide a view out.
Bivalne prostore je mogoče ustrezno prezračevati tudi, ko so vrata zaprta; poleg tega imajo skupni dnevni prostori dovolj dnevne svetlobe in omogočajo čim več pogleda navzven.