HSS 60-12-2-G-13 TANK SIZE = 60, 4-HYDRO CIRCUIT WITH 15-58 (115V 3 SPEED) HEAT / COOL ZONE, 8-HDRO CIRCUIT WITH 26-99 (115V 3 SPEED) HEAT ONLY ZONE 8-HYDRONIC SIDE PUMP INSULATOR (FITS 26-99 PUMP SERIES ONLY) 2-W/W CIRCUIT WITH 26-99 (230V 3 SPEED) WITH PUMP INSULATOR 2-HEAT AND COOL CONTROL B&D MANUF.