Where should you position a fan to the shroud?

You should position a fan to the shroud in a way that optimizes airflow through the radiator or heat exchanger. Typically, the fan should be mounted directly against the shroud to ensure a tight seal, minimizing air leaks and maximizing cooling efficiency. If the shroud is designed for push-pull configurations, you can also position a second fan on the opposite side to enhance airflow. Always consider the direction of airflow to ensure it aligns with the intended cooling path.