To really conserve energy, what can be done is to build what is called a tile stove, oven stove, or masonry heater.
Here are some sites that explain the concept, but more so, show lots of gorgeous pictures of these devices. Granted, a modern, high-tech version could be far smaller and lighter and even more efficient, if designed by an expert.
http://www.lowtechmagazine.com/2008/12/tile-stoves.html
http://www.inspirationgreen.com/masonry-heaters.html
http://www.rvharvey.com/kachelofen.htm
What is alien to most Americans is the idea that you are not convection or conduction heating the air, instead you are bathing a room in invisible infrared radiation that heats you, and everything it shines on, quite efficiently.
This kind of information could be taught to our kids via pioneer after school clubs.
I was going to mention the tile stoves of Europe. Thanks for the links. They are beautiful stoves. Would love to have a place for one. Upstairs won’t take the weight.