Cleaning my fresh air fan housing, motor, fan ect. I notice this spring wires clipped to a few random fan blades and out of curiosity wondering what they might be for? Anybody know


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Mine had those too. I'm guessing they are balance weights.

That's the only thing my small logical brain could come up with as well, but do you think that a little plastic squirrel fan really needs to be precision balanced? I find it hard to believe. That lite gage wire can't add that much weight but why else would the thing have these calibration marks on it.

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My guess is that the blower spins fast enough that being out of balance could cause vibration and rumble. I've seen similar, but wider weights on cheap plastic box fans but thought the same thing about the size of those wires. They do seem rather pathetic but maybe make enough difference when the blower is spinning at speed? After pondering mine for a couple seconds, I just though, "those Germans..." before buttoning everything back up.

Brent

Its for balance and attenuation

attenuation... double word score.