This part is located around the fan section. The fan is the device that pushes fresh air in to the combustion chamber, allowing the gas to be burnt correctly. It also removes the remaining burnt gas after the combustion process is complete. The boiler has safety parameters in place to make sure no gas can be passed through to the main burner if the fan has ceased functioning
Circular Outlet
Technical specification
ERP RatingNot ApplicableCompatible WithAlpha C23 & C27Supplier Part Number1.018745Brand NameAlpha