... high temperature smoke produced by complete burning of fuel (coal, oil, gas, etc.) exchange heat with organic heat ... 60% and 85% according to the difference of boiler type.FuelCoal, water gas, city gas, mixed gas, light oil, heavy oil, residual ... air atomization system.Gas-firedFuel gas filter, pressure switch, Gas pressure regulator, leak detection pump, solenoid valve.Application of thermal oil ...