Experiment with the 3-way setting for the fans. Medium seems to work just fine, but if you really do not like noise, start with low. At this point, the pump and third fan are beginning to make more noise overall.

If you have your temperature setting to "LO", you may need to set the fans higher to maintain the maximum dissipation of heat.

If you have sudden hot flashes which need immediate cooling, you may need the fans on high, although the thermal mass of the whole system should moderate those heat swings.

Users who select a higher target temperature (especially one above the ambient), will probably find they do not need the higher speeds.