HEATERS ARE ELECTRIC AND HAVE FINNED TUBULAR HEATING ELEMENTS POSITIONED IN FRONT OF A FAN UNIT TO PROVIDE EVEN DISTRIBUTION OF HEAT. ELECTRIC HEATERS ELIMINATE COMBUSTION BYPRODUCTS ASSOCIATED WITH FUEL-FIRED HEATERS. TUBULAR STEEL FRAME WITH ERGONOMIC HANDLE AND HAND SCREW ALLOWS FOR EASY TILT ADJUSTMENTS & 10"" WHEELS ALLOW FOR EASY MOVEMENT OF UNIT. ON OFF SWITCH AND ADJUSTABLE THERMOSTAT CONTROL KNOB ARE MOUNTED ON THE TOP OF THE UNIT. HIGH-LIMIT THERMAL CUTOUT SWITCH PROVIDE EASE OF USE. REQUIRES 75 AMP CIRCUIT BREAKER. SALAMANDER HEATERS ARE DESIGNED FOR DIRECT WIRE INSTALLATION. ACCESS PANEL ALLOWS DIRECT WIRING CONNECTIONS. 25'L 4/3 SO TYPE POWER CORD IS INCLUDED. CSA & CSAUS LISTED. EASY ASSEMBLY OF HANDLE AND WHEELS.