this guy Conrad mentions these filters in his scam-list :
http://www.conradbiologic.com/articles/EMFscams.htmlwe all get scammed once in a while.
aside from these bad results, Charles stated that using more than five filters can create unhealthy resonances.
also worth reading :
http://www.emfrelief.com/capacitive-filters.html"So a capacitor filter, by whatever name, will Not make your electricity cleaner, but dirtier." ( ...) !
on the same page :
"The associated problems are typically 1) Neutral to Neutral wiring errors (with either Knob-and-tube, NM (Romex), or BX/MC), 2) Neutral to Ground wiring errors (with either knob-and-tube or BX/MC), or 3) normal shared Neutral paths between adjoining users (with any type of wiring)."
This refers to the other post of today by Fog Top.