Question: I am never home. How could my energy bill be so high?

Answer:

A number of factors contribute to your total bill. Among these factors are the outside temperatures, the efficiency of the heating system, how well your house retains your generated heat, and the setting of your thermostat. Each of these could be a factor in your energy bill.

You may want to consider allowing sun to enter your home during the day, reducing your use of ventilating fans, replacing your furnace filter and sealing your windows.