Z1957 Heat Exchanger DHW (Z542129)

Z1957 Heat Exchanger - DHW. The domestic heat exchanger has two different types of heat exchangers that can be fitted, the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and it transfers the heat from the burner to the water within the system. The secondary heat exchanger is only present in combination boilers and allows the heat to be transferred from one closed system to another. Suitable for the Ecplise esc and linea boilers. Genuine brand new NSS product, covered by a NSS manufacturer's guarantee.