Biasi Condensing Heat Exchanger BI1782101

The Biasi BI1782101 is a condensing heat exchanger used in Biasi Advance series gas boilers. It transfers heat from the combustion gases into the heating and hot water circuit, and in a condensing appliance it also recovers latent heat as the flue gases cool. It is the primary heat transfer component of the boiler.

• Water weeping from the heat exchanger body or its connections
• Visible corrosion, scale build-up or pitting on the exchanger surfaces
• Boiler repeatedly locking out or tripping on overheat
• Reduced heating or hot water output with no other obvious cause
• Combustion readings outside the expected range for the appliance

• Confirm the boiler model and GC number against the fitment list
• Check whether the appliance is natural gas or LPG, as both variants are listed
• Verify the part number BI1782101 against the manufacturer's parts list for your appliance
• Inspect the seals, pipe connections and mounting points that will be disturbed during replacement