Abstract: An airtight combustion chamber in a house has a draft hole formed through a first end and a draft door movably mounted thereon to selectively open the draft hole to a desired extent, controlled by a thermostat. The wall of the second spaced opposite end of the combustion chamber has a steel stove door movably mounted thereon. The second end coincides with a doorway formed through a chimney wall which is common with the house. Wood is supplied to the stove through the stove door for combustion. The products of combustion are removed from the stove via the stove door. The stove door has a smoke pipe extending therethrough into the chimney and a damper on the end of the pipe. Heat from the fire in the airtight chamber escapes into the house through decorative screens above and in front of the stove, simultaneously warming rock or brick walls at the sides of the stove and a rock or brick wall of the house.