I bought this system and the single fan system almost 3 years ago, they are installed in my media cabinet and run 24/7 at medium to high speeds depending on where they are in the chain. I clean them when I notice a build up of lint and dust so they get very dirty before I clean them and even then just using a vacuum I never really took them off to really clean them but I do have one few times used a compressed air. once. They plug into a power strip with built in USB adapters and low voltage adapters, they're not very loud and never bother me, they can be heard a bit when nothing is on and you're standing next to them. These are excellent fans that I would recommend to anyone, this brand is top notch.
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