[Arminius]

Since you and I live within spitting distance, I will say that my last gas bill was about $174 for a 4,500 sq ft home, which is kept at 60 degrees except for about 6 hours a day when it is at 68 degrees in half the house. The month before that, I believe the bill was about $400, because it was very cold and my son was home from college for a few weeks and was up all day and night trying to use up as much natural gas as possible.

Edit: Part of my house is a mother-in-law suite, and I don't know what she keeps her thermostat at. I suspect she keeps it at 66 degrees all day and night. But the numbers above include her energy use as well as mine.

Edit: My house has four separate zones, each with its own thermostat. The air/heat is only on in 50% of the house at any give time.