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![VAILLANT ECOTEC PLUS 637 837 937 MAIN HEAT EXCHANGER KIT 0020135134 ( 7 COILS )](http://www.capitalboilerparts.com/cdn/shop/products/173891093094-1_130x.jpg?v=1569086682)
![VAILLANT ECOTEC PLUS 637 837 937 MAIN HEAT EXCHANGER KIT 0020135134 ( 7 COILS )](http://www.capitalboilerparts.com/cdn/shop/products/173891093094-2_130x.jpg?v=1569086682)
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