A rocket mass heater (also termed rocket stove mass heater) is a space heating system developed from the rocket stove, a type of efficient wood-burning stove, and the masonry heater.
Its fundamental characteristics are an insulated combustion chamber
where fuel (generally wood) is burned with high efficiency at extremely
high temperatures, and a large thermal mass in contact with the exhaust
gases which absorbs most of the generated heat before the gases are
released to the atmosphere. According to various reports a rocket mass heater can reduce fuel consumption by 80 - 90% compared to "conventional" stoves.
