Electric Convection Heater, Ceiling, Voltage 208, 60 Hz, 1 or 3 Phase, 24.0/18.3/12.0 Amps AC, 5000/3800/2500 Watts, 5/3.8/2.5 kW, Output BtuH 17,100/13,000/8500, Width 16 1/2 In, Length 20 In, Depth 5 3/4 In, Air Temp Rise 45 F, Surface Mount Type, Neutral Grey, Built-In Features Adjustable Directional Airflow, Agency Compliance UL & CUL