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The Stetzerizer filters move a small amount of current through the electrical system from the power company and through the house through the filter.  They do NOT, however, increase current flowing through devices.  There is no negative effect or risk on appliances.  The filters actually help to protect appliances and electronics.  The filters can help motors to run more efficiently and cooler, and help cancel out voltage spikes on the power system.  I can think of one example of a school in Wisconsin that after installing the filters, they didn't have to replace computers and electronics nearly as much - saving enormously on their electronics budget each year.

I hope that helps.  In 10 years the only device I can even think of that the filters interfered with was one particular home automation system that used the powerlines for communication.  The filters are compatible with just about everything and don't cause any negative side effects with devices/appliances :)

Let me know if I can help with anything else. Have a great day!

It is possible that this coating or layer is a reflective/conductive layer.  If it is truly designed to reflect radiant heat, then it should also have an RF reflection quality as well.  The only way to know is to test it.  Try with an HF35C or Acoustimeter.  Place a radiation source (WiFi router, cordless phone, etc) and put the coat close to it or over it.  See if it is lower with the coat than without the coat :)

Great question.  The Stetzerizer Filters are designed properly to only utilize the "Hot" (ungrounded conductor) and "Neutral" (technically called the grounded conductor).

The filters are 2-prong only and designed purposely this way.  They will work great with your ungrounded outlets.  Beware of 3-prong knockoff filters made by other brands that utilize the ground plug and tie-in filtering circuitry to it.  Ground is not supposed to be used for those types of purposes.

Grounded outlets are always preferred for safety and also necessary for shielded cords and things.  So do NOT use a shielded power cord, surge suppressor, or extension cord in those ungrounded outlets.  In fact you shouldn't use any 3-prong device or cord in an ungrounded or improperly grounded outlet.

The filters are safe as they are 2-prong only, they are non-polarized so they can be used either direction (you can flip them upside-down and use them that way). They are UL listed.  Thank you for your question!

My thoughts on it would be it's probably not as bad as some types of EMF.  The reason being it is DC - direct current - powered.  However, we don't know if it is pulsed at all.  Pulsed EMF could be a concern.  Even static DC EMF can be a concern - it's not natural.  Some parts of the body and organs and tissue would be exposed to one polarity, and others could be exposed to a different polarity.  This could confuse the body and cause abnormal biological effects.

There is not a lot of research on this.  As with anything, it is taking a risk.  Having heating elements so close to the body like that - producing magnetic fields...seems risky to me.  Measurements could be taken and then compared to standards such as those set forth by the International Institute for Building Biology and Ecology.  We've never measured such a device.  This is news to me that they exist even.