Ultra Low NOx - Low Emission Burners Ultra Low NOx burners incorporate two key technologies to lower burner peak flame temperature and NOx emissions.  These Technologies Include: • Combustion staging • Flue gas recirculation Callidus Ultra Low NOx Burners Feature: • Maximum NOx formation reduction • NOx lowering mechanism is completely integral to burner design • Steam injection not needed • Uniform heat flux transfer to process tubes • Capability to burn a wide range of fuels • High turndown capability • Multiple firing orientations (vertical up or down, horizontal) • Adaptable for short flame length requirements Typical Ultra Low NOx Burner Applications: • Where very low NOx emissions are required • Where uniform heat flux distribution is critical • Most new process heaters today, particularly for U.S. West Coast and U.S. Gulf Coast • Heater retrofits for Best Available Control Technology (BACT) NOx reduction Callidus Ultra Low NOx Burner Models: • LE-CSG (Low Emission Callidus Staged Gas) • LE-CRG (Low Emission Callidus Raw Gas)