As far as pressurised and flame reverse boilers, output up 490 kW, the new IDEA series NGX burners are designed in order to get emission values under the 80 mg/kWh NO_x emission limit. The correct mixing of air and fuel is achieved thanks to the simple and efficient combustion head adjusting system, assuring the very low nitric oxide levels stated by law. By mantaining a right combustion ratio, the flame can be optimised for all the combustion chamber length. Some of this series burner components, as the noiseinsulating air inlet, the ABS cover and the burner synoptic panel make this product range advanced in the low polluting emissions burners market.