I live in Southern California, so I can get away with doing this almost year round. But I rarely turn on the thermostat, even in winter. I usually have the windows open to cool off in the summer and in the winter I just wear socks and a sweater. I will occasionally turn on the thermostat when it's extra cold and raining, but that's it. So my heating bill for the year always stays well under a thousand for the whole year. Does anyone else live in an area that they can do this?