Comfort within a building.
In the pursuit of energy conservation we must not forget the Vitruvian principles of commodity, firmness and delight. The pursuit of comfort is a basic drive in human behaviour, evolved for the purpose of survival, and is not just a sign of wimpishness! If the occupants of a building are subjected to discomfort for substantial periods no amount of architectural delight will compensate, nor will reduced energy bills.
Comfort is a far more holistic experience, being dependent upon the interaction of many environmental factors, the variability and options that the environment offers, and the ability of the occupant to determine those options. We only have to look at how people spend their holidays to realize that the feeling of well-being is not prescribed by narrow environmental limits.
This is particularly applicable to passive buildings, where conditions are naturally more variable, and it is becoming apparent that this natural variability may be a positive attribute, provided the variation remains within limits. A further requirement is that variations relate to natural or outdoor conditions, and not a fault in the control system or a quirk of the management.
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