40mm Creality fan

thingiverse

The stock Creality 40mm fan is a decent, but somewhat underpowered cooling solution that struggles to keep up with more demanding printing jobs. While it's a good starting point for beginners, those who want to tackle complex prints or print for extended periods will need to upgrade to a more robust fan setup, such as the D15 or D30, which provide significantly improved airflow and better temperature control.