The Baxi 5114687 is a genuine OEM primary heat exchanger designed for selected Baxi Duo-tec, Megaflo, and Platinum Combi boilers in the 24kW and 28kW ranges. The primary heat exchanger is responsible for transferring heat from the burner into the boiler’s central heating water circuit, ensuring efficient heating performance.

A failing or blocked heat exchanger can cause reduced heating output, kettling noises, overheating lockouts, fluctuating temperatures, increased energy consumption, or internal leaks. Replacing it with this genuine Baxi part restores high-efficiency heat transfer and ensures reliable boiler operation.

Key Features:

• Genuine Baxi primary heat exchanger

• Designed for 24kW & 28kW combi boiler models

• Ensures efficient heat transfer from the burner

• Helps resolve kettling, overheating, poor flow temps & internal leaks

• Built to Baxi’s strict OEM material and performance standards

• High-efficiency, corrosion-resistant stainless-steel construction

• Direct-fit replacement for quick, professional installation

Compatibility

The Baxi 5114687 Heat Exchanger is compatible with selected models across:

• Baxi Duo-tec Combi (24 / 28)

• Baxi Megaflo Combi (24 / 28)

• Baxi Platinum Combi (24 / 28)

• Additional boilers listing 5114687 in their official parts documentation

May also fit:

• Certain Main Eco / Eco Elite variants

• Potterton Promax Combi models (where cross-referenced)

Installers must always verify exact compatibility using the boiler-specific service manual or parts list.