This part uses the following part numbers: Federica Bugatti - BI1506 101 Airfel - H3101091294010 Kentatsu - H3101091294010 Hi-therm - H3101091294010 Federica Bugatti - 7021940011 The spare part is compatible with the following boilers: Federica Bugatti Atmo Airfel Digifel Kentatsu Nobby Smart Hi-therm Optimus Federica Bugatti ECO Federica Bugatti Turbo
