[nakkali_kuere]

I don't understand, why do we need a thermostat in house? Isn't the normal environmental temperature outside just good. Why artificially change it?

[waitwhat]

The "normal environmental temperature outside" hasn't been good enough since the first caveman started a fire in his cave for warmth.

[LaGrange]

I don't know about California, but here in Poland it looks like this: http://en.wikipedia.org/wiki/Geography_of_Poland#Climate

And those are the nice averages. Sometimes (more often than you'd guess) the temperature decides to drop to a nice −20C. In the same place, in the same year, temperature in summer can get to 30C.

I can easily agree that people over regulate temperature — 25C in winter or 20C in summer is probably not that optimal (I just don't do cooling, but offices do). But a lot of people live in areas where the outside temperature is just not an option.

[splicer]

Come visit Ontario in January.