The Swirl's EMF is considerably low, and the device is certified by the FCC, ETL, and CE.
What creates the vortex is not an electromagnetic field but two magnets that are upside down.
In addition, we constructed a screen shield for the small engine inside the porcelain base, which ensures that the engine is 100% separate from the carafe and water.
We hope it answers your question. Feel free to let us know if you need more information.