Used in the following models: 400, 701, 501, 801, 601, WH 55, WB 51, WH 85, WB 81, WH 110, WB 106, WH 155, WB 151, WH 199, WB 211, WH 285, WH 399, SB 1000, SB 1300, SB 1500, FB 1500, FB 2000, FB 2500, FB 3000, FB 3500, AW 1000, AW 1300, AW 1500, AW 151, AW 200, AW 286, AW 400, AW 501, AW 601, AW 701, AW 801, XP 1015, XP 1320, XP 1520, XP 400, XP 501, XP 601, XP 701, XP 801, SNA 285, SNA 400, SNA 500, SNR 150, SNR 200, 502, 652, 752, 992, 1262, 1442, 1802, 2072, KB 400, KB 501, KB 601, KB 701, KB 801, KB 80, KB 105, KB 150, KB 210, KB 285, KB 399, KB 500, KB 600, KB 700, KB 800, AW 150, AW 199, AW 285, AW 399, AW 500, AW 600, AW 700, AW 800, WB 50, WB 80, WB 105, WB 150, WB 210, CH 402, 402, Copper Fin II Parts, CH 402-752, Copper Fin II 402-752, Copper Fin II Parts, CH 502, 502, CH 652, 652, CH 752, 752, KB 81, KB 211, KB 106, KB 286, KB 151, PB 502, PF 502, PB 752, PF 752, PB 1002, PF 1002, PB 1302, PF 1302, CH 992, 992, CH 1262, 1262, CH 1442, 1442, CH 1802, 1802, CH 2072, 2072, 501, 991, 1801, 651, 1261, 2071, 751, 1441, Lochinvar Parts, Hydronic Heater Parts, Lochinvar, Lochinvar, Lochinvar, Knight, Floor Standing KB, Wall Mount WB & WH