Baxi Platinum Combi 24/28 HE Main Heat Exchanger (4 Element) – Refurbished | Part No. 5122147

When a Baxi Platinum Combi 24 HE or 28 HE boiler suffers reduced heating output, inefficient combustion, or heat exchanger failure, this is the exact replacement part needed. The Baxi Platinum Combi Main Heat Exchanger 5122147 – 4 Element is a fully refurbished direct replacement designed specifically for the Platinum Combi range — restoring efficient heat transfer from the burner to the heating and hot water circuit.

This is a fully refurbished original Baxi part, quality-checked and tested by experienced engineers before dispatch. The 4-element design is the correct specification for the Platinum Combi 24/28 HE series (including later-serial HE A models). This listing covers the Platinum Combi range specifically; if you have a Duo-Tec, System, or ErP model, please check our other 5122147 listings for the correct fit.

Compatible Boiler Models

Key Features

• Baxi part number 5122147 — 4-element (4E) main heat exchanger for Platinum Combi 24/28 HE series
• Fully refurbished and quality-checked by experienced engineers before dispatch
• Fits Platinum Combi 24 HE, 24 HE A (after BMY0815), 28 HE, 28 HE A (after BNC0932)
• 4-element design provides efficient heat transfer with good surface area coverage
• 12-month warranty included

Delivery & Returns

Orders placed before 1:00 PM (Monday–Friday) are dispatched the same working day. Standard and next-day delivery options available at checkout. Next-day orders placed on Fridays arrive Monday — select Saturday delivery at checkout for weekend delivery. Returns accepted within 30 days if unused and in original packaging.

Note: Installation must be carried out by a Gas Safe registered engineer.