The notion of a thermal optimum persists There is an underlying assumption that the best thermal environment never needs to be noticed, and that once an objectively "comfortable" thermal environment has been provided, all of our thermal needs will have been met. The use of all of our extremely sophisticated environmental control systems is directed to this one end—to produce standard comfort zone conditions. Lisa Heschong, Thermal Delight in Architecture heatcomfortenvironmentux
Each element performs many functions Each element in the system should be chosen and placed so that it performs as many functions as possible. Bill Mollison, Introduction to Permaculture The multiplicity of living patterns function