No dust on fan blades. Supply does need more than 5 single pass mix 43 or 31 ferrites, on the DC leads, to eliminate conducted/ radiated noise up to 225 MHz. 3 single pass ferrites on the AC leads plenty. Works up to 14.8V on the 2 we received without tripping over voltage (highest voltage the pot will allow). Fan runs at VERY slow speed at low current after the unit warms up. Fan just a bit noisy at full speed. Also over current and over temp protection. Automatic reset on over temp, so if the fan would fail, no damage, but an indication the fan has failed. MeanWell makes at least some of the switching supplies for Dura Comm!
Verified purchase: Yes | Condition: Pre-owned
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