The Vaillant 0020135133 Heat Exchanger – DHW (6 Coil) is a genuine replacement domestic hot water heat exchanger designed to deliver efficient and reliable hot water performance in compatible Vaillant boiler systems. This precision-engineered exchanger uses a 6-coil configuration to transfer thermal energy from the boiler’s primary heating circuit into the domestic hot water circuit, ensuring rapid and consistent hot water delivery at the desired temperature. Manufactured to Vaillant’s strict quality and safety standards, it is intended to be fitted by a qualified heating engineer during servicing, maintenance, or when replacing a worn, fouled, or failed heat exchanger.

Compatibility for the 0020135133 DHW heat exchanger (6 coil) includes Vaillant combi and system boiler models that utilise this specific coil design for domestic hot water production. Always confirm your boiler’s exact model and part requirements before installation to ensure correct fit and dependable performance.

Using a genuine Vaillant DHW heat exchanger helps maintain efficient heat transfer, supports stable hot water delivery under varying demand, and contributes to the long-term reliable and energy-efficient operation of your central heating and hot water system.