Beldray Mini 5 Fin Oil Filled Radiator.
Oil filled radiators use conduction to heat up.
Conduction works by transferring heat between materials that are in direct contact with each other.
The better the conductor, the more rapidly the heat will be transferred.
When cool air contacts the heated surface, it immediately heats up and rises, drawing in more cool air and causing the process to repeat.
This is known as convection.
Oil filled radiators use oil, a good heat conductor. the larger the surface area the radiator has, the more efficient it is at heating the air.
This radiator uses mix of large and small fins, creating a larger surface area in order to provide a warm, cosy, atmosphere.