This series has essentially no danger of a backfire as it employs an external mixture combustion method.  This ensures stable combustion in a wide range of applications.  The burner and control are designed in compliance with the safety requirements for the gas appliances and equipment.  Well arranged layout of the burner head, fan and control results in a compact construction to enable effective use of a small space.  A strong pilot flame ensures a secure ignition of the main gas. Both the main and the pilot burner are so designed as to allow simple removal and reinstallation, thus providing ease of inspection, cleaning and other maintenance.