Master-4104.147-Luftschlauch

An air tube, also referred to as a blast tube in burner terminology, is the component that directs the combustion air from the fan to the combustion head. It forms part of the firing side of the appliance, and its internal diameter, length, and the geometry of the attached head determine how the air mixes with fuel and how the flame develops in the chamber. In burners and air heaters, the air tube is typically mounted on the burner front plate and extends into the combustion chamber. When selecting a replacement air tube, the key parameters are the tube length, the flange pattern that bolts to the burner, and the inner diameter, which must match the fan outlet and the burner output range. The head geometry also influences flame shape and stability; some designs include a diffuser or flame retention ring. During replacement, it is essential to measure these dimensions against the original part and to confirm that the tube allows the burner to set the correct air‑fuel ratio and flame pattern for the appliance. The Master 4104.147 air tube is listed under catalogue number 696.835.007. No further specifications for this particular article are available beyond the brand and reference codes. For correct selection, compare the physical dimensions and mounting pattern of this piece with the part being replaced, using the general guidelines for air tubes and blast tubes as described above.