and the safety that  prefer wood heat over other forms  Kachelöfen or grundofens are what they are called in Europe. In North America we call them masonry heaters or brick heaters. The masonry heater large compared to the wood stove that many Americans use to burn wood.  The  masonry heaters ceramic. The European tradition involves a charge of wood that is burned rapidly in the firebox. After the products of combustion leave the firebox they enter either channels or chambers  where the heat is extracted and stored in the thermal mass for up to 24 hours.  In the United States and Canada they are called masonry heaters brick heaters brick stoves In Europe they called Kachelofens, Grundofens, Finnish Contraflows, Swedish Kakelugn and Russian Bells.