What gender is 'radiator' in?

In English, the Word "radiator" does not have a grammatical gender, as English nouns are generally gender-neutral. However, in languages with grammatical gender, such as Spanish or German, the Word for radiator may have a specific gender. For example, in Spanish, "radiador" is masculine, while in German, "Heizkörper" (another term for radiator) is neuter.