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Thanks osiyo, very helpful information!

How effective were you in detecting issues with the VFD through the BMS? From what I understand, because of the fluctuation one of the ways to monitor the VFD is to "filter" out the high end...

I am not sure of the restaurant standard, but in patient rooms air changes per hour ACH only needs to be 5, however in an OR that number is increased to at least 20. I believe schools need to have at...

I should have been more clear, I am referring to a current switch to be placed on the load side of the VFD drive, not the line side.

With building and food codes in the restaurant industry my guess would be that there is less of a likelihood that mold exists in restaurants than in your house.

There is yet to be a reliable current switch for VFD's.

If you are using CVD's I would recommend a current switch though. They are reliable (assuming you do your research) and inexpensive and...

Sense-Air makes a very high quality device. Many brands out there today (Veris, Senva, etc) use the sensor element from Sense-Air, so not a bad idea to go to the source itself.