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HHV - sg = 0.6 [1] Combustion air: 15° C - 21 % O2 - 50 % humidity - sg = 1.0 [1] Stated pressures are indicative. Actual pressures are a function of air humidity, altitude, type of fuel, and gas quality. Burner size & type 100 300 550 700 850 1100 1500 1800 back pressure [2] mbar Max. capacity [3] kW (HHV) 0 125 340 550 720 850 1050 1472 1800 1.5 110 285 500 675 775 880 1266 1693 Min. capacity [4] kW (HHV) 0- 1.5 5.0 6.0 10 15 15 25 25 25 Pilot capacity [5] kW (HHV) 0-1.5 7.5 10.0 15 25 25 40 4