These new models build on the features of the well-established R Series with key advances in power output control and ventilation. Suitable for gas, light oil or dual fuel application, advanced combustion technology ensures low NOx levels conforming to Class 3 EN 676.

The new burners come in various control configurations. These include modulating operation using an electronic cam for closer and more repeatable control of the air-fuel ratio, as well as options for variable speed drive of the combustion air fan motor to reduce energy consumption and noise levels. Integration of O2 trim control is said to ensure the highest achievable combustion efficiency is maintained throughout the modulation range.