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Vaillant ecoTEC PLUS 618 R3
The pump is located after the primary heat exchanger within the heating appliance and allows the heated water to be circulated within the closed heating system
Ideal FF 30
VAILLANT VUI 376/5-5 (2012-CURR)
41-075-61)
VAILLANT ECOTEC PLUS 637 / 837 / 937 MAIN HEAT EXCHANGER KIT 0020135134, REFURBISHED CARTRIDGES/REPAIRKITS Vaillant ecoTEC PLUS 618 R3Vaillant 0020135134 Heat Exchanger 7 Coil ecoTEC Plus. Product Information: There are two different kinds of heat exchanger that can be present, they are the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and it allows the heat to be transferred 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