Of course, there is also the possibility of combining these two systems - fixed and ventilating.
A fan system is almost the same as a fixed system with hoses until the moment when hoses ends. The hose end is stuck to the steel ring with the nozzles which is located on the fan itself.
Fans must have a fixed base on which they would be attached, such as a wall or a solid metal construction, since their work causes low vibration.
Fans have their own advantages and disadvantages.
The advantage of fans in comparison to fixed systems is that, in addition to cooling, they perform and increase air circulation (especially in case of weather conditions when there is no such circulation or wind).
Tastes differ and only they will ultimately determine which system best suits your preferences and requirements.