Radiators are heating devices that are commonly used to warm up a room or a building. They work by transferring heat from a hot surface to the surrounding air, thus raising the temperature of the room. Radiators are typically made of metal, such as cast iron or aluminum, which has good heat conductivity.
Radiators are often connected to a central heating system, where hot water or steam is circulated through pipes and into the radiator. As the hot water or steam flows through the radiator, it warms up the metal surface, which then radiates heat into the room. The warm air rises, creating a convection current that helps distribute the heat throughout the space.