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Steps to a General Theory of Habitability

A theoretical basis is presented for a unified discussion of the sustainability and habitability of the built environment. This theory is inspired by concepts in human ecology, information theory, and thermodynamics. It suggests, in a first approximation, to subsume the quality of the built environment in view of provision of comfort, flexibility, control, and informational quality as a “Habitability Index,” which, ideally, could be ordered on a negentropic scale. Likewise, the environmental impact of buildings may be captured in terms of a “Sustainability Index,” which is assumed to inversely correspond to the entropy increase (in the relevant environmental system) attributable to the building activity.