Home » Products » Solid fuels » SilvaWIN Klassik » Technical Data SWK170T SWK240T SWK240M Nominal thermal output range kW 9.7 – 17 12.3 – 24.6 24 Boiler efficiency % 90.2 90.1 90.2 Flow temperature min./max. °C 100/65 100/65 100/65 Return temperature min. °C 45 45 45 Boiler water volume l 65 65 65 Filling chamber l 92 92 92 Weight kg 360 360 360 Installation dimensions (W x D x H) mm 630 x 1,050 x 1,460 630 x 1,050 x 1,460 630 x 1,050 x 1,460 Minimum draught requirement mbar 0.05 0.05 0.05 Flue gas temperature rated load** °C 182 195 208 Electrical connection W 120 120 60