Testing is highly significant

NunnaUuni fireplaces are tested according to the SAA 142/222 testing and measurement standard for heat-storing fireplaces. This method reveals both the heat properties of the fireplace and the efficiency of burning. In many of the other tests that we could have chosen, the fireplace is used according to different instructions for use than those for real-life applications. Thus, those test results do not match reality. In the SAA 142/222 test, the fireplace is used according to normal instructions for use, which means that the test corresponds to normal real-life use. The NunnaUuni fireplaces are tested according to this standard in the Fraunhofer institute for building technology in Germany (Fraunhofer Institut für Bautechnik), where the test was developed. The test results prove that NunnaUuni fireplaces are in a class of their own.


The figure shows a calorimetric room where the fireplace is tested and measured according to the SAA 142/222 test and measurement method. In this test, the amount of heat produced by the fireplace is determined (in terms of kWh). The test also measures the temperature of the combustion gases released and the emission levels of the combustion gases.











The nominal heat output is the most important variable indicating the heat storage capacity.

The heat storage capacity of a fireplace is measured using the so-called nominal heat output, one of the most important variables assessed in an SAA 142/222 test. It indicates how long the fireplace releases heat at maximal efficiency, and how high that maximal efficiency is.