An oil heater is a machine that heats up a room using oil as the primary method of heating. The machine typically runs on electricity and can be used in both residential and commercial settings. If you're in the market for an oil heater, you might also want to consider other terms for the equipment. For example, you could refer to it as an oil-filled radiator, an oil-fired heater, a hot oil heater, a space heater, a portable heater, or a convection heater. Whether you're looking to heat up a small room or an entire building, an oil heater is a reliable and efficient way to stay warm and comfortable.