Abstract: The instant invention is a heat reclaimer that is positioned within the chimney of an existing outdoor wood stove. The reclaimer is heated by the waste heat leaving the combustion chamber of the outdoor wood stove. This waste heat is captured in the reclaimer by heating water inside the reclaimer then recirculating that water to the existing outdoor wood stove raising the temperature of the return water in that outdoor wood stove and thereby increasing the efficiency of the outdoor wood stove. The device maximizes the efficiency for specific heating outdoor wood stoves by extracting BTUs from waste or lost flue gases through a safe and environmentally sound practice. The device saves substantial amounts of resources as well as time gathering and preparing the fuels.