Gas burner compliant with European standard EN676. Single-stage operation. Regulating combustion air and blast-pipe. Combustion air intake with throttle damper. Manual adjusting of the air flow rate. Fully closing air damper on shutdown to avoid loss of heat through the chimney. Maintenance facilitated by the possibility of removing the combustion head without having to remove the burner from the boiler. Fail proof connectors for burner/gas train connection. Gas train exit: high. Sound-proof plastic protective cover. Flame detection by ionisation electrode with connector for micro amp meter. 7-pole socket for burner electric and thermostatic supply. Electric protection rating.