A Viessmann return house with retaining clips, nuts, cable tie and fibre washer for the heat exchanger of Vitodens boilers. The heat exchanger transfers heat from a boiler's burner to water. A primary heat exchanger is found in all boilers, using heat from a burner to raise the temperature of the water in the system while a secondary heat exchanger is present only in combis and allows the heat to be transferred between closed systems.
Delivery is free on all orders. We deliver all around the UK using DHL and Parcelforce. Standard delivery will take 1-5 working days to reach you. However, once the order is received, we will contact you to give you a more precise timescale. Usually, we will deliver the next day, subject to the date and time of when the order is received and the product.
Orders placed during the weekend will be processed the following Monday for delivery the following day. In the case of Bank Holidays, your order will be processed the next working day and delivered the following working day.
Remote areas: For orders to some addresses, especially in the Highlands of Scotland and Offshore, next day delivery options are not available, and delivery can take several days. Saturday delivery is unavailable for these areas.
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