Tulikivi Heat Storage Design
The old adage "a picture is worth a thousand words" certainly applies to understanding how a Tulikivi fireplace is able to capture and store heat energy from the flue gases generated by a hot fire in its firebox and which are then circulated through heat exchange channels in the mass of the fireplace before exiting the chimney.
On the otherhand, an EPA certified wood stove, such as Tulikivi's
Zevio, has no diversion of the flue gases through the mass of the heater. Rather, the flue gasses exit the firebox and proceed directly to the chimney.
The following link takes you to a gallery of sixteen different sectional drawings showing the path of the flue gases as they circulate through the mass of a variety of Tulikivi designs. There are five different flue path configurations shown in this gallery.
Another gallery shows 7 different drawings of the flue paths inside Tulikivi bakeovens & cookstoves .