Primary heat exchanger AL SI BOB 20/25 De Dietrich 7668805

The primary heat exchanger AL SI BOB 20/25 is a critical component that transfers heat from the burner to the water in your boiler. Made from aluminum-silicon alloy, this heat exchanger offers good thermal conductivity and corrosion resistance. It is designed for specific boiler models, typically in the 20-25 kW range. If the heat exchanger becomes clogged, cracked, or corroded, boiler efficiency drops and safety risks increase. Replacing it with a compatible primary heat exchanger AL SI BOB 20/25 restores optimal heat transfer and extends the life of your heating system.