Ive been running these EZ Fans from San Mateo electronics.For three years.There a/c 220v .10amp I run them with 110v a/c and they make no noise .The guys there, said cabinet makers use them in Entertainment cabinets.No noise for these quiet times during movies etc.I was worried about longevity but 3yrs +.They even plugged in a bunch so I could compare noise CFM