Back in the day, when I heated with natural gas, I just set the thermostat at 70 and was happy. I got high tech with a programable thermostat and saved a little by thinking more about when I really needed to have the house warm. Now I all of my heat comes from burning wood and realize I am constantly solving the heat puzzle. What is happening outside? Warming up or getting cold? What kind of wood is next to go in the stove? Elm (starts quick, burns fast), cherry (lasts longer) or locust (this must be what its like to heat with coal). How much air to add? Do I need to warm up the house 5 degrees or just maintain where I am? That 150 million btu wood pile that seemed enormous in September is disappearing! My friends at work think I'm a little daffy with this, but I have to tell you I really enjoy this daily chess game. The money saved is just the icing on the cake. The real satisfaction comes from waking up each day and devising a plan to keep you family warm no matter what happens.