At its best, a warm, atmospheric moment seems to last forever. Our selected MammuttiStone, the best-quality soapstone from NunnaUuni's deposit, also lasts almost forever. 

NunnaUuni's unique new Golden Fire burns wood at an exceptionally high and even temperature. Therefore, the fire chamber material needs to withstand extreme heat, too. At the same time, the stone should store thermal energy in the structures of the fireplace and release it gently and evenly. 

NunnaUuni's MammuttiStone and Golden Fire – pure thermal power


The foliated talc network of the selected MammuttiStone used for the fire chamber conducts the large amount of heat produced in the high temperatures of the Golden Fire quickly into the structures of the fireplace.

The foliated MammuttiStone on the outer surface of the fireplace circulates the heat along the outer shell and thus transfers heat into the room evenly and for a long time.

The hottest part of the fireplace, the fire chamber, stores 60 to 70% the thermal energy. The remaining 30 to 40% is stored in other fireplace structures through the flueways.