A portable gas-burning heater is commonly known as what?

A portable gas-burning heater is commonly known as a salamander. This term specifically refers to a type of heating device that burns gas, making it portable and suitable for heating specific areas or spaces, often used in construction sites, warehouses, or outdoor events. Salamanders are designed to provide immediate heat and are known for their efficiency in warming up an area quickly, which is why they are favored in settings where flexibility and mobility in heating are required.

The other terms mentioned relate to different heating devices. For instance, a radiator typically refers to a system involving hot water or steam that heats a room through radiative heat transfer. A heater box doesn't refer to a widely recognized heating device and could be ambiguous. A furnace is generally a large, fixed heating system that uses fuel to heat air or water to be distributed throughout a building. Therefore, identifying the correct terminology is essential in understanding which device is utilized for portable gas heating applications.