radiator
/ˈɹeɪ.diˌeɪ.tɚ/noun
A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.
Related words
thermostatA device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting.mantelThe shelf above a fireplace which may be also a structural support for the masonry of the chimney.furnaceA device that provides heat for a building.fireplaceAn open hearth for holding a fire at the base of a chimney.boilerAn apparatus for heating circulating water or other heat transferring liquid.skylightA window, dome, or opening in the roof or ceiling, to admit natural light.