The new standard H type CINQUECENTO series Low NOx burners Class 2 (< 120 mg/kWh), made in aluminum housing with a backward curved centrifugal impeller is studied and developed to get high performance and efficiency combined with low emissions. This series with a maximum power of 6.850 kW, are in this selection of product that is particularly competitive. The userfriendly application and maintenance are the strengths of these burners.