Used ARX CeraDyna 24V 120mm x 120mm x 38mm powerful cooling fan. speed: 2800rpm. power: 24VDC 0.35A 7.2W. Has seen light use in old project - no dirt build-up on the fan and rotor spins smoothly. Note this is a 24V fan, but can be run at 12V for much less output, but much quieter.
