Dirancang untuk menghitung efisiensi tungku perumahan dan peralatan pembakaran, 23 to 113°F (-5 to 45°C) ambient temp, -4 to 1202°F (-20 to 650°C) flue gas temp
0 to 20.9% oxygen measurement range, 0 to 2000ppm carbon monoxide measurement range
0.1 to 100% combustion efficiency, 6 user-selectable fuels