Three sided frame model. We wanted to preserve the feel of the old house we bought, but not live in a museum. Saving the old woodwork was obvious, but we wanted to give the old coal-burning stove a modern and discrete style. It should be obvious that it is modern and has efficient technology! The large glass door lets the beautiful fire really come into its own. The heat output actually surprised us, and it’s a bonus that it can be fired in such an environmentally friendly way.