VAILLANT ECOTEC PLUS VUW 824 831 837 & 937 AUTO AIR VENT 104521. This part is present in 133 different boilers in the Vaillant range including the Vaillant ecoTEC PLUS (2005-2010), ecoTEC PLUS (2005-2010), ecoTEC PLUS (2005-2010), ecoTEC exclusive 832, TURBOmax PRO (2002-2008).
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