That's why in the winter, if you have a 40 degree day after several days at 20 degrees or colder, it seems much warmer. With air conditioning, you get used a certain temperature level and when you step outside, it feels warmer than it really is. One side effect of all of this is that over time people develop preferences for certain temperatures. They learn what feels right for them and act accordingly. Unfortunately, there are individual differences in the preferences for heat and cold which is why you can end up with those classic thermostat wars at home and in the office.
People have different tolerances.
What's cold for me might not be the same for two different people. The worst problems were associated with building that had false ceilings which trapped moisture and then began emitting an odor like vomit. Improved technology, such as adjustable fans and dampers in air conditioning units, allow more fresh air into buildings. In addition, young architects and engineers are routinely educated about sick building syndrome. This will, no doubt, mean new developments to alleviate odors and illness associated with air-tight buildings.