This is the 2239th most frequent German word.
fan
A person who is enthusiastic or passionate about someone or something.
Here, 'Fan' is used as a noun to indicate a person who has a great admiration or interest in something.
Ich bin ein großer Fan von klassischen Filmen.
I am a big fan of classic movies.
In this context, 'Ventilator' is used as the word for 'fan', referring to a device that creates airflow for cooling.
Wir haben einen neuen Ventilator für den heißen Sommer gekauft.
We bought a new fan for the hot summer.
Again, 'Fans' in plural form is used to signify supporters or enthusiasts of a team or event in this sentence.