A weaker one is probably enough, a refrigerator like this doesn't give off much heat.

Thank you very much, it is important that the fan, as you write, "moves a lot of air". Because of the noise, the Noctua NF-F12 PPC 2000 PWM might be an alternative. The fan is switched via a temperature sensor and then runs for a few minutes depending on the temperature. When it is running, it is always "full throttle". Greetings Werner

I can't say whether the connection and voltage of the fan are suitable. But it is definitely a strong fan that moves quite a lot of air. At full power, however, it also makes a lot of noise...