Electric Convection Heater, Ceiling, Voltage 277, 60 Hz, 1 Phase, 18.1/13.7/9.0 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, Recessed Mounting Box Dim 22 1/8x22 1/8, Neutral Grey, Built-In Features Adjustable Directional Airflow, Agency Compliance UL & CUL