4. Total number of chambers (sum of 2 and 3a) ____

14. Number of rooms, kitchens and total number of chambers (questions 2-4) [p.17]
While gathering information for questions 2-4, a following definition of a room should be used.
A room is a space, which is separate from other spaces in the dwelling by stable walls, constructed on the whole length between floor and ceiling, with direct lighting, of measurements not lower than 4 cubic meters.

The direct lighting is considered as a window (or glass doors), which are located on an external wall, that is creating an entrance to yard, street, garden, vestibule etc.

If a room in a dwelling hasn't got a window with direct sun lighting, then even in the case of having a small window (skylight) which creates between the spaces and another room or vestibule and even if it has measurements of more than 4 cubic meters -- it cannot be considered as room.

Rooms are considered both as living spaces and kitchens, which fulfills these requirements. Vestibules, halls, bathrooms, toilets, pantries, enclosed porches and passages, storages, compartments and agricultural chambers -- regardless of their measurements and the way of lighting -- cannot be treated as rooms.