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Evolution in qualitative demand for future residential and commercial buildings is expressed through very various and, sometimes, non-compatible, tendencies.
However, all these demands have to be satisfied in a common environment of, one more time, different constraints.
The synthesis of both demands and constraints is very specific to national contexts. For example, the concept of "sustainable building" is different from a country to another, depending on the availability of resources (space, water, energy, ... ).
Concerning the triangle "building - comfort - energy", our analysis for France seems to be applicable to Western Europe demands and constraints are organized around 6 main themes:
- a wider comfort (multi-sensitive, psychological, services and life convenience),
- more flexibility (intermittent housing, adaptation to the market evolution, adaptable comfort to
- different rooms, activities, occupants),
- respect - and, if possible, improvement - of occupants' health.
- a limited environmental impact,
- compatibility with a refurbishment market,
- economical performance for commercial buildings with a specific theme for residential ones (to give housing and comfort to impoverished occupants).
It is not easy to give a good answer to such a variety of demands and constraints. However, the paper deals about 2 possible applications of these themes to future buildings :
- a special attention is given to "environmental respect" in a residential project.
- a house in a flat, a car connected to a house