Dimplex Thermostat has 126/155°C adjustable temperature. It is compatible with AC6814, AC6815, AC6816, AC6816, AC6819, AL7553, CXLS24N, HSXCA24XN, HSXDA24N, NC3300WCOM, NL10659, SFHA24AW, SSH24ACW, STHC330A, TSR24ACW, TSR24NAC, VASCHA24, WMCS724N, WMS712N, WMS718N, WMS724N, WPSH3300COMBI, XMS712N, XMS712N, XMS718N, XMS724N and XMS724N storage heaters. It is to be fitted by a suitably qualified/competent person.