FWIW, my office building when I worked in Bangkok used a temperature differential rather than a fixed thermostat setting, eg target room temp =outside temp-12. Apparently this was a sophisticated energy saving approach as the aircon would have to alter its efforts (just the humans inside )

This meant that in winter when it was 30 outside, it was too cold inside at 18; but in summer when it was 38, it was an unbearable 26 inside....

I attended the opening of Suvarnabhumi, and the I noted the tiny dots over the glass exterior which ruins any photographic desires. The small dots are apparently ceramic and designed to deal with the heat in a way to avoid diurnal (day-night) temp variation by absorbing heat in the day and gently radiating it at night, perhaps with the idea that the aircon would not need to change its cooling efforts (much) over a 24 hour period. This is a few years ago now and I forget the exact details - but look for the small dots!