Improve Furnace Efficiency
If you are upgrading your furnace, install an energy-efficient furnace. It can save you up to 25% of your home heating costs and depending on your existing furnace, could pay for the higher initial cost in about seven years.
For every 2 degrees F (1 Celsius) you lower your thermostat, you save 2% of heat energy used. Reducing the room temperature in the evening and when the building is vacant can have a large impact on your heating costs.
A programmable thermostat allows you to dictate when your heating system will automatically reduce the temperature. There are many options available; some include several time periods per day, for each day of the week. There are also a few electricity utilities will even give you a free programmable thermostat if you sign up for an energy demand program. Check with your local utility.