Scambiatore primario caldaia Riello Residence 24 KIS DGT6 3S ,rotto. Ma si po cambiare

Scambiatore primario caldaia Riello Residence 24 KIS DGT6 3S ,rotto. Come scambiarlo Dove l ho trovato https://www.ebay.it/itm/194363430996 SCAMBIATORE PRIMARIO MONOTERMICO CALDAIA RIELLO FAMILY RESIDENCE AQUA OBLO' SCAMBIATORE PRIMARIO CALDAIA RIELLO venditore climacore E' installabile sui seguenti modelli: Caldariello Aqua 24 BIS Family 26 KIS 3S Oblò 24 KIS 3S/28 KIS 3S Oblò IN 24 KIS 3S/28 KIS 3S Prontacqua 24 BIS 3S Residence 24 IS DGT 3S/24 KIS DGT 3S/28 KIS DGT 3S Residence Aqua 24 BIS Residence Externa 24 KIS/28 KIS Residence IN 24 KIS/28 KIS Family 24 KI Family 26 KIS 3S Oblò 24 KIS 3S Oblò 24 KI Oblò IN 24 KI Oblò IN 24 KIS 3S Residence 24 I DGT N Residence 24 KI DGT N Residence N 24 I Residence N 24 KI Residence N 24 KIS 3S Residence N 24 IS 3S Residence Externa 24 KI