The Viessmann 7841779 Plate Heat Exchanger – 18 Plates is a genuine replacement component engineered to deliver efficient and dependable thermal transfer in compatible Viessmann boiler systems. This 18-plate heat exchanger is designed to move heat from the boiler’s primary circuit into the domestic hot water and central heating circuits, helping maintain consistent temperature delivery, strong performance, and energy-efficient operation. Manufactured to Viessmann’s exact quality and performance standards, it provides durable, long-lasting service when installed by a qualified heating engineer during servicing, maintenance, or when replacing a worn, fouled, or failed exchanger.

Compatibility for the 7841779 plate heat exchanger (18 plates) includes Viessmann combi boilers and other models that utilise this specific 18-plate exchanger configuration. Always verify your boiler’s exact model and part specification before installation to ensure correct fit and optimal performance.

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