The TPI Corporation FHK13243A portable electric infrared heater has a wheeled steel enclosure that is double-layered to help keep outer surface cool for safety, has wire screens for protection of the heating element, and an infrared element that produces radiant heat appropriate for spot heating of small rooms and work areas. The infrared element is housed in a U-shaped steel sheath for protection against vibration. The reflector is made of gold anodized aluminum that helps provide efficient transfer of radiant energy into the room or workspace in a 60-degree symmetrical heat pattern. The 13.5kW heater heats up to 192/225 square feet (below/above 35 degrees) of non-protected area, or 270/375 square feet of a semi-protected area (below/above 35 degrees). The single- or three-phase, 240V wiring is compatible with most appliance circuits and requires ground fault protection. The unit weighs 65 lb. and can be used with a power cord and temperature controls (sold separately). 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.