Bouton de commande des volets d'aération De Dietrich 300028746

The air flap knob is used to adjust the air intake on boilers and burners, controlling the combustion process. Turning this knob regulates the amount of primary or secondary air, affecting flame intensity and efficiency. This replacement knob is designed to fit standard air flap mechanisms, offering precise control and a secure fit. If your current knob is missing or damaged, installing this part helps maintain proper air-to-fuel ratio, improving performance and reducing emissions.