1500 WATT HEATER 120V HEAVY-DUTY CEILING HEATERS HAVE A WHITE POWDER COATED 18 GAUGE STEEL GRILL. THESE COMMERCIAL HEATERS FEATURE A STEEL BLOCK FIN ELEMENT AND AN AUTOMATIC RESET THERMAL LIMIT THAT DE-ENERGIZES HEATERS IF OVER-HEATING OCCURS. THE FAN PURGE CIRCUIT REQUIRES 4-WIRE SUPPLY WHEN A REMOTE WALL THERMOSTAT IS USED. VANE AXIAL FAN BLADE WITH 700 RPM MOTOR PROVIDES 175 CFM. CEILING HEATERS INCLUDE AN EASY-TO-USE DISCONNECT SWITCH. CEILING HEATERS MEASURE 14-3/16""W X 4D X 19-15/16""H APPROX. GRILL MEASURES 15-3/8""W X 20-1/8""H. 1 YEAR LIMITED WARRANTY.