És itt a hőcserélő linkje: https://www.ebay.co.uk/itm/RADIANT-KIT-HEAT-EXCHANGER-BI-THERMAL-ART-58026LA-6500328-BOILER/263786329191?epid=21012590301&hash=item3d6ae3f467:g:F7gAAOSwUU1alWMV