Learn more about NOx reduction. NO x formation in boilers. NO x (oxides of nitrogen) refers to the cumulative emission of nitric oxide (NO) nitrogen dioxide (NO 2) and trace quantities of other nitrogen-bearing species generated during combustion.Combustion of any fossil fuel generates some level of NO x due to high temperatures and the availability of oxygen and nitrogen from both air and fuel.
Two boilers using FIR burners are installed and running at Fullerton College California. The boilers are used to supply steam heat to the campus buildings and utilities. These boilers operate at less than 9 ppm NOx while maintaining thermal efficiencies of over 85%.