Process Heater Burners for Refineries, Petro-Chemical Design guidelines for C-B NATCOM burners are based on aircraft jet engine combustors, where the burner and combustion chamber are fully integrated. Using advanced numerical simulations (CFD), C-B NATCOM has developed modeling software that simulates, in a virtual environment, fuel and air distribution required to achieve complete combustion using actual furnace geometries. Every C-B NATCOM burner is custom-designed for each specific application and furnace configuration, thus ensuring that the burner/boiler is a totally integrated efficient and low emission package.