I live near Barcelona, those days the temperature reaches 27-28C. We don't put the AC, we open the balcony door and the air current is enough. In winter, we r

I live near Barcelona, those days the temperature reaches 27-28C. We don't put the AC, we open the balcony door and the air current is enough. In winter, we reach at most 5C, we don't put also the heating. Some neighbors have it very high and in our apartment the temperature is 20-21C.