How do ceiling fans collect dust when they’re constantly in motion?
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Just bc they are in motion doesn’t mean they can’t collect dust. The fact that they are in motion means they contact even more dusty air than say a counter top in a room with poor circulation.
We could go on to talk about boundary layers or static charges but the real reason is that it’s a surface that dust can stick to so it does. And it high up so it get cleaned rarely.
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