The new N type MILLE series Low NOx burners Class 3 (< 80 mg/kWh) made in aluminum housing with a backward curved centrifugal impeller have been developed to meet the current and future requests regarding the low emissions of NOx. The innovation of the combustion head allows to achieve substantial improvements in terms of emissions reduction, flame stability and reliability. The perfect mix of air/gas within the combustion head of these burners, guarantees a very uniform flame in all working conditions. These burners can be equipped with electronic control box, O2 probe and frequency inverter.