... safety design for PC program. MODELB-05B-10B-20B-30Heat Range(KCAL/H)20,400-51,10020,400-102,00020,400 ... -204,00020.400-306,000Heat Range(BTU/H)50,000-200,00080,000-400,00080,000 ... -52-202-202-30Fuel input (G/H)0.5-1.30.5-2.60.5-5.20.5-7.9Air Pressure ...