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SunTouch Floor Heating EMF Ratings & Explanation

SunTouch Floor Heating EMF Ratings & Explanation

EMF and Electric Floor Heating

An emerging issue in the electric radiant heat industry is EMF (electromagnetic frequency) radiation. Some electric radiant floor heating companies sell only single-wire systems that release very high levels of EMF. Other radiant heat flooring companies have pioneered and sell only dual wire EMF-canceling technology.

Electromagnetic fields (EMF) come from all electrical appliances, but studies show an average American's daily exposure is less than 1 unit (mG) of EMF. When you sit on an unshielded electric radiant floor, you may be exposed to 20, 40, or more times the average daily exposure. Shockingly, some electric floor heating products expose homeowners to about the same electromagnetic field radiation as if you put your face directly against the door of a microwave oven, and left it there; but not SunTouch.

Know Your Exposure

Today, there is only one scientific and independent third party test to measure electromagnetic fields produced by electric radiant floor heating systems, known as "REET" or Radiant Electric Emissions Test. Watts Radiant and the ETL Semko division of Intertek, the global leader in the testing, inspection, and certification of products for manufacturers, developed REET. Unlike unverifiable claims made by some companies, the REET test measures each company's electric heated floor products according to standard procedures.

REET Test Procedures for Floor Warming

The REET test procedures specify twenty standard points of measurement across a four foot by four foot area of warm tile floor. Unlike some companies that measure EMF two or three feet above the floor, ETL makes each measurement at an exact height of 1/2" above the electric cable or mats. Those point measurements are averaged together to yield an average radiation value for each product for both electric and magnetic field radiation. Calibrated, laboratory grade test equipment is defined in the REET procedures and used by ETL Semko technicians to conduct these tests. Health care concerns have focused on the magnetic, or H-field, measured in milligaus or mG.

The first series of test results for Watts Radiant electric radiant floor heating products and for other manufacturers showed a startling variation in H-field exposure. In one notable head-to-head comparison of electric mats of similar size and amp rating, a competitive product emitted 462 times the H-field radiation as the Watts Radiant mat.

The Difference is in the Wire Construction

There is no practical technology for passively shielding a heating element to virtually eliminate H-field EMF. The only effective approach is "active shielding". This means canceling the H-field of one heating element with the H-field of another parallel element. SunTouch Floor Heating Mats innovated this approach with a complex wire made using two insulated heating wires and running them in parallel with a patented helical twist.

Dual Heating Wires, individually insulated with ETFE, strengthened with Aramid Fiber, surrounded with a metal mesh braid that grounds the mat end-to-end and finally covered with PEX a water proof and extremely durable material (Blue). The construction of SunTouch mats is unequalled.

The prestigious ETL Semko Laboratory (ETL was founded by Thomas Edison in 1904) recently tested Watts Radiant’s SunTouch floor warming product along with four competing products according to the rigorously defined REET procedures. Each heating product covered about 35-40 square feet, which is the most common coverage for residential bathroom installations. The results are clear and speak for themselves:

suntouch emf testing results

SunTouch Technology is ETL Semko Tested and Safe

If you are concerned about EMF exposure, insist that any electrical floor warming products be tested by ETL Semko, and that the true EMF output, according to the REET test, be published and made available to you.

How to Get Started with SunTouch?

Browse our website, choose a mat size now or Call 1-866-558-3369, Fax 1-866-558-2010 or Email us for free design assistance. We will help you in every way possible to make your next floor warming home improvement project a success!

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Ask a Question / Leave a Comment


  • Lisa C.
    Author: Lisa C. Posted: October 30, 2016

    What happens if I want to install in a much larger area than just the bathroom? Like in the whole house?

    • Author: Jacquelyn S. Posted: October 31, 2016

      Hi Lisa,

      Adding electric floor heat to an entire house is actually pretty common these days.
      If you have a layout of the house, you can email it to us and we will help you figure out how much material and how many circuits you will need.

      Warm Regards,
      - The Warm Your Floor Team