I do love wood, and nothing irks a woodworker more than to see furniture grade wood being chopped up and burnt. We live in northern Ontario in the middle of a 100 acre bush lot. How to provide heat for the shop was obvious, but it had to be done efficiently. We purchased this masonry heater to provide the heat. Weighing in at about 2 tons of refractory concrete and clay bricks. This giant heat sink has only 2 moving parts, the door and a spring loaded chimney cap. A 1 1/2 to 2 hour fire is all that is required to keep our 2000 square foot shop comfortable for 24-48 hours. Most of the wood burned is provided in the shop in the form of waste from making furniture.