Auxiliary Electric Heater; Voltage Rating 208/240 Volt AC at 60 Hertz 1 Phase; Wattage 10.8 Kilowatt at 208 Volt, 14.4 Kilowatt at 240 Volt; Current Rating 17.3/34.7/52 Amp at 208 Volt, 20/40/60 Amp at 240 Volt; Used On TZ/TE/TS and TT; Approval ETL Intertek (Canada and US), AHRI; Supply Circuit Single, Dual L1/L2, L3/L4; BTUH Rating 36900 BTU/Hour at 208 Volt, 49100 BTU/Hour at 240 Volt