How Devi Floor Heating Mitigates Electromagnetic Fields

Danfoss DEVI floor heating systems mitigate electromagnetic fields (EMF) through
engineered twin-conductor cables. Because two wires run parallel in opposite
directions, the opposing magnetic fields cancel each other out. Additionally, the
cables feature a 100% continuous metal screen/ground sheath that eliminates
electromagnetic radiation and ensures safety.
How the EMF Shielding Works
Danfoss DEVI heating cables use specific architectural and material features to
block EMF:
• Twin-Conductor Design: By running two conductors alongside each other,
current flows in opposing directions. The magnetic fields generated by these
adjacent wires effectively cancel each other out, resulting in near-zero EMF
emission.
• Metal Screening (Braided or Foil): Every indoor cable is surrounded by a
metal shield (usually copper or aluminium) connected to a protective earth
wire. This layer blocks electric fields from radiating into your living space.
• Compliance with Standards: DEVI cables are fully screened and tested to
demonstrate compliance with rigorous international electromagnetic standards
(IEC/EN 60335).

How Devi Danfoss Mitigates Electromagnetic Fields

Important Considerations for Shielding Effectiveness
For the EMF shielding to work optimally:
• Proper Grounding: The braided screen or protective wire (PE wire) must be
correctly connected to the main power supply’s ground (earth) to drain any
induced current.
• Twin, Not Single: Ensure you are using a twin-conductor mat (e.g., DEVImat
or DEVIflex) rather than a single-conductor cable if you want absolute peace
of mind regarding EMF cancellation. Single-conductor cables require both
ends to return to the thermostat, which can sometimes generate slight
residual magnetic fields.

How to Confirm and Compare
• Verify the Manual: You can view or download the technical specifications
directly from the Danfoss Underfloor Heating Document Library.
• Test the Output: If you want to verify the EMF emitted after installation, you
can use a basic handheld EMF Tester capable of measuring extremely low
frequency (ELF) radiation.