Thermal information is not differentiated in our memory; rather it is retained as a quality, or underlying tone, associated with the whole experience of the place. It contributes to our sense of the particular personality, or spirit, that we identify with that place. In remembering the spirit of a place, we can anticipate that if we return, we will have the same sense of comfort or relaxation as before.
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.
Textbooks on water-system engineering state that supply mains are generally installed on the north side of the street in the Northern Hemisphere and on the south side in the Southern Hemisphere, so that the sun will warm them. In both hemispheres they are supposed to be on the east side of north-south streets, on the premise that the afternoon sun is warmer than the morning sun.
The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of thermal comfort. It was later adopted as an ISO standard. It predicts the average vote of a large group of people on the a seven-point thermal sensation scale where:
The [Silmarils] are good; their making was at least potentially innocent; but afterward arose a lust for owning and controlling that led to great tragedy… The aspect of humanity which the elves represent most fully – both for good and ill – is the creative one.”
And this is why “making” in and of itself is not the answer to our decadent moment. “Love of things, especially artificial things, could be seen as the besetting sin of modern civilisation, and in a way a new one, not quite Avarice and not quite Pride, but somehow attached to both” – and this is the Fëanor Temptation. It is in light of this temptation that I advocate repair, which is a mode of caring for what we have not made, but rather what we have inherited. We will not be saved by the making of artifacts — or from the repair of them, either; but the imperative of repair has these salutary effects: it reminds us of our debt to those who came before us and of the fragility of human constructs.