The TPI Corporation 198TMC combination fan forced/radiant portable heater has dual fan forced and radiant heating elements that can be used separately or together to warm small rooms and work areas. The steel enclosure has a handle for portability and a wire cage for safety. The radiant element operates at 600W, the fan forced element operates at 900 watts, and both may be used together for a total of 1500 watts. The unit includes a thermostat for adjustable temperature control and has a manual reset switch for overheat protection and a tip-over switch to disable the heater for safety. It includes a 6’ long, three-conductor power cord and is wired for 120V for compatibility with most standard circuits. The unit weighs 9 lb. and is compliant to standards for use in the United States and Canada by United Laboratories (UL). Electric heaters generate warmth through a central heating element that is housed in a reflective enclosure that concentrates the energy produced. An element made of a combination of metals produces heat or infrared energy by the electrical resistance created when an electric current passes through it. Fan-forced heaters pass air over the heating element to expel heat from the enclosure for greater throw and circulation. Radiant heaters do not use a fan, but warm nearby objects through energy transfer. A heater’s voltage and wiring should be matched to the electrical circuit where it is to be used. Heaters are used in a range of commercial applications that include shop floors, construction sites, and industrial buildings. All local electrical codes should be followed when installing permanent mounted electric heating equipment.TPI Corporation manufactures industrial and commercial electrical heaters, process heat ovens, ventilation products and fans, lighting equipment, and thermostatic controls. The company, founded in 1950, is headquartered in Johnson City, TN.