They can be fired with – Light Oil / Furnace Oil LPG / Natural Gas Solid Fuels Standard Operating Capacity Range : 50 – 850 kg /hr (Steam) Our Coil Type Boilers are fitted with highly efficient & adjustable high pressure, solid injection type burner working at 150 psig & above. Moreover, they are provided with a special vortex chamber, which gives high combustion efficiency by thoroughly mixing automised fuel oil & air. The combustion air is preheated by waste heat available from the boiler shell which ensures better combustion & thermal efficiency.