Energy efficiency class A. Energy efficiency index 106. Nominal heat output . space heating output kW 5.42. water heating output kW . Maximum operating pressure bar . Testing pressure bar . Water content l . Thermal discharger . Efficiency % 80.01. CO at 13% O2 % 0.088. PM emissions at 13% O2 mg/Nm3 39.50. NOx at 13% O2 mg/Nm3 118.30. OGC at 13% O2...