To heat the small structure, Blee and Halligan installed a 17.75-inch-tall, 15.75-inch-wide, and 15.75-inch-deep wood-burning stove equipped with a built-in water boiler. The stove was built into an old doorway that was no longer needed. By wrapping the walls in sheet steel, Blee and Halligan made the area fire-resistant, and the warmth from the stove is amplified as it reflects into the room. Though it's handy in the winter, the stove-boiler combination is merely decoration in the summer: "It's so hot that we just bathe in the river nearby," Blee says.  Modern Wood-Burning Stoves by Megan Hamaker from A Couple Restores a Seemingly Hopeless Mill in France