A radiator is a device used to transfer heat from one medium to another for the purpose of heating a room or space. It typically consists of a series of metal fins or tubes that circulate hot water or steam, which warms the air around it. Radiators are commonly found in homes and buildings as part of a central heating system. Radiators can be powered by various energy sources, including natural gas, electricity, or oil. They come in different shapes and sizes, allowing for flexibility in design and installation. Proper maintenance of radiators is essential for efficient heating and energy conservation.