Product Information: There are two different types of heat exchanger that can be installed, they are the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and it allows the transfer of heat from the burner to the water within the system. The secondary heat exchanger only appears on combination boilers and allows the heat to be transferred between 2 closed systems.
This part is present in 4 different boilers in the Vaillant range including the Vaillant ECOmax VUW 286 E , ECOmax VUW 236 E , VUW 236 E , VUW 286 E .