The Vaillant 0020020018 is a genuine OEM 13-plate domestic hot water (DHW) heat exchanger designed for use in Vaillant ecoTEC Pro VUW combi boilers. This plate heat exchanger efficiently transfers heat from the boiler’s primary circuit to the domestic hot water supply, ensuring fast, reliable hot water delivery.

Over time, plate heat exchangers can become restricted by limescale, sludge, or debris—leading to poor hot water performance, temperature fluctuations, lukewarm water, or error codes. Replacing it with this genuine Vaillant unit restores proper hot water flow and consistent performance.

Key Features:

• Genuine Vaillant 13-plate DHW heat exchanger

• Provides efficient hot water heat transfer

• Designed specifically for ecoTEC Pro VUW combi boilers

• Helps resolve lukewarm water, flow issues & temperature fluctuations

• Manufactured to Vaillant’s strict OEM quality standards

• Durable, corrosion-resistant stainless steel construction

• Direct-fit replacement for fast, reliable servicing

Compatibility

The Vaillant 0020020018 DHW Heat Exchanger is compatible with:

• Vaillant ecoTEC Pro VUW combi boilers

• Any Vaillant model that lists 0020020018 in the official parts documentation

Installers should always verify exact compatibility using the boiler’s model-specific service manual or parts list.