Low NOx

Low NOx Applications

All burners are capable of meeting tough US federal codes regarding low NOx emissions. Numerous installations of this nature have been carried out with excellent results.

We believe that in order to meet local codes for low NOx requirements, efficiency should not be compromised; therefore our burners have been designed to operate at sub 30 ppm while operating at 3% O2 or lower throughout the firing range. This is due to the utilisation of flue gas re-circulation and the superior flame retention and mixing achievable from the Limpsfield design.

Our burners have been designed to operate at sub 30 ppm while operating at 3% O2 or lower throughout the firing range.

Low NOx can be achieved by using ‘Flue Gas Recirculation’. This is done by using one of two methods either forced FGR or induced FGR depending on application. FGR is accomplished by forcing the flue gases with a separate fan back into the combustion zone (forced FGR), or by drawing the flue gases through the combustion air fan (induced FGR). Both methods reduce the bulk flame temperature in the furnace to inhibit the chemical reaction between the nitrogen and oxygen. FGR systems reduce NOx emissions without reducing efficiency.