I live in a 1.5 story (all electric, central air/heat) house in Northern Mississippi. I am trying to determine the disparity between my heating and cooling bills. The upstairs is rarely used and most often the system if off. We have a programmable thermostat downstairs. During the winter months we keep the downstairs around 75F and during the summer around 72F. My winter electric bill practically triples from the summertime amount. Is this typical? Regards to all, O'Neal