FAMIS 26297

H0:VAC-MX_FAN1_370_2_ACC_INCHSEC has a very Strange looking reoccuring ingrease in its noise.
It looks like this fan wasn't being used until about 100 days ago. 100 days ago it seemed to be fairly noisy as well, but this is strange looking and very different.
it seems like the fan is noisy for 12-16 ish hour and quiet for 8-16 hours. Maybe this particular fan isnt on for 8 hours,
It's likely it turns on at 1Pm and turns Off at 9-10 pm.

I think this is a new noticable development since the last time I checked on the Vibrometers.