The Vaillant 0020209544 is a genuine OEM primary heat exchanger designed for efficient heat transfer within compatible Vaillant boilers. As a core component of the heating system, this heat exchanger transfers heat from the burner to the circulating system water, ensuring reliable heating performance, improved efficiency, and long-term operational stability.

Faulty or blocked heat exchangers can lead to kettling, poor heating output, error codes, and boiler lockouts. Installing this genuine Vaillant replacement restores proper functionality and helps maintain peak boiler performance.

Key Features:

• Genuine Vaillant primary heat exchanger

• Provides efficient and consistent heat transfer

• Helps resolve kettling, overheating & poor heat output

• Manufactured to Vaillant’s strict OEM quality standards

• Durable, corrosion-resistant construction

• Essential for restoring boiler reliability and efficiency

• Suitable for professional installation and servicing

Compatibility

The Vaillant 0020209544 Heat Exchanger is suitable for a selection of Vaillant boilers, including:

• ecoTEC Plus models (specific versions vary)

• ecoTEC Pro units

• ecoFIT and ecoTEC Sustain boilers

• Any Vaillant model specifying 0020209544 in its official parts list

Installers should always verify compatibility using the boiler’s service manual or parts documentation.