Rhythmic Fan Humming is driving my customer crazy

[Joe.B]

One of my customers has changed out fans in 3 rooms several times and each one gives the same rhythmic humming.

Are the ducts for any of these fans tied together? It could be that two or more fans sharing a duct could be setting up some kind of oscillation. I've heard that this is one of the reasons connecting exhaust fans is no good.

 

[ptonsparky]

Are the ducts for any of these fans tied together? It could be that two or more fans sharing a duct could be setting up some kind of oscillation. I've heard that this is one of the reasons connecting exhaust fans is no good.

These are ceiling fans, not exhaust.

 

[LarryFine]

Ducts?

 

[ptonsparky]

Now that ducts are mentioned...is there a chance one may be in close contact to the fan box support?

 

[Joe.B]

These are ceiling fans, not exhaust.

Yup, totally misread that. Thanks.

 

[Dennis Alwon]

I don't think you'll ever satisfy your customer because he just says over sensitive hearing. Every fan will make some type of noise moving the air alone will make a sound so it seems to me like it's a no-win situation

 

[Joe.B]

white noise generator - Google Shopping

 

[Ravenvalor]

Would looping the hot through a ferrite magnet either at the fan or at the switch help?

 

[Tulsa Electrician]

Up load to YouTube and post link

 

[Tulsa Electrician]

Have him try these.

 

[Clint623]

Would looping the hot through a ferrite magnet either at the fan or at the switch help?

View attachment 2565047

I’m willing to try whatever


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