Worcester Bosch Baffle Set 20-25 Set of 6 87161046850

The Worcester Bosch baffle set, part number 87161046850, contains six baffles for Worcester oil-fired boilers. Baffles sit in the flueways of the heat exchanger, slowing the passage of hot combustion gases so more heat is transferred into the water circuit instead of disappearing up the flue. They are a service item: soot, condensate and repeated heating cycles eventually distort, corrode or block them, and efficiency drops with them.

• Rising fuel consumption or a boiler that runs longer to reach temperature, suggesting heat is passing through the flueways rather than into the water.
• Higher than expected flue gas temperature readings when the appliance is commissioned or serviced.
• Visible distortion, warping, cracking or heavy corrosion on the baffle plates once they are withdrawn.
• Heavy sooting or a build-up of debris bridging the flueway gaps, restricting the gas path.
• Rattling or movement from the flueway area, indicating a baffle has come loose from its seating.

• Confirm the exact appliance model and serial number against the compatibility list, as the baffle set is listed for specific Boilerhouse and Danesmoor variants.
• Compare the baffles removed from the appliance with the new set for length, profile and count before fitting.
• Check whether the flueway or access gaskets and seals disturbed during the strip-down also need replacing.