Electric Ceiling Panel Heater, Overall Length 23 3/4 in, Overall Width 23 3/4 in, Overall Depth 7 in, Overall Height 5 3/4 in, 1 Phase, Voltage 277V AC, Wattage Output 2500W/3800W/5000W, Housing Color Gray, Heating Method Fan Forced, Heating Capacity 8500/13,000/17,100 BtuH, Mounting Type Recessed, Thermostat Included No, Air Flow 300 cfm, Air Temp. Rise 45 Degrees F, Amperage 18.1A/13.7A/9A, Frequency 60 Hz, Control Type Thermostat, Heater Mounting Position Vertical Burn