A salamander heater is any of a variety of portable forced-air or convection space heaters, often using kerosene or propane as fuel but also requiring electricity, used in ventilated areas for worksite comfort. Salamander heaters are most often found at construction sites. Depending on style, they can also be referred to as "torpedo furnaces", "salamander furnaces", or simply, "salamanders".Salamander heaters date back to at least 1915. In the early 1940s, W.L. Scheu of Scheu Manufacturing Company, a leading producer of temporary portable space heating equipment, developed the modern Salamander heater to provide warmth to allow construction crews to work in inclement weather. Sales spread across the US, and by the 1950s, to Europe.