Log In

EMF Radiation: A Real-World Case Study

Written by

Warmset Australia

24 November 2025

 • 

4 min read

banner
One question that often arises is whether electric underfloor heating generate significant electromagnetic fields (EMFs). To address this concern, a client of Warmset (Italy) conducted real-world measurement at a private residence in Montecchio Maggiore (VI), Italy, assessing the EMF levels produced by Warmset. A full report was produced for their homeowner client and this article summarizes the measurement process, the standards referenced, and the findings—concluding that the observed EMF levels were practically zero.

Purpose of the Test

The main objective was to measure both electric and magnetic fields in a normal residential environment where an electric underfloor heating system was in operation. Specifically, the test focused on the system’s performance at 50 Hz (the standard mains frequency in Europe).

Test Procedure

  1. Location and Timing
    • The measurements took place at a private home in Montecchio Maggiore, Italy, on January 17, 2019, from approximately 10:30 am to 11:30 am.
  3. Equipment and Setup
    • The home’s electric underfloor heating system was identified as the primary source of potential EMFs.
    • Measurements were taken under two different conditions: with the system switched “off” and then at “full load” (operational).
    • Two key heights were examined:
      • Floor level (0.15 m above the floor).
      • Standing height (1.5 m above the floor).
  5. Measurement Points
    • To ensure the highest accuracy, spot checks were done around the living area to find a “worst-case” location (i.e., where the fields might be strongest). Those spots were then measured for the heating system turned off versus on, to note any changes.
  7. Regulatory References Used
    • CEI 211-6 Guidelines for measuring fields at 50 Hz.
    • Italian Decree DPCM 08/07/2003, which provides:
      • Exposure Limits (the maximum permissible level for short-term exposure).
      • Attention Values (for areas where people spend time briefly).
      • Quality Values (for areas where people spend extended periods, e.g., homes or offices).
    • European Recommendation 1999/519/EC (ICNIRP 1998), which provides broader guidelines for EMF exposure across various frequencies.

Key Regulatory Thresholds

Although regulations can appear technical, here’s a simplified overview of the relevant Italian thresholds for 50 Hz (mains frequency):

  • Quality Value (long-term exposure):
    • Magnetic field limit: 3 µT
    • Electric field limit: 5 V/m
  • Attention Value (short-term exposure):
    • Magnetic field limit at 50 Hz: around 0.033 µT (though specific calculations vary)
    • Electric field limit: 10 V/m

For a standard home environment, the 3 µT Quality Value is one of the key benchmarks for day-to-day exposure.

Measurement Findings

  • Magnetic Field (B) at Floor Level (0.15 m): ~0.03 µT
  • Magnetic Field (B) at Standing Height (1.5 m): ~0.032 µT
  • Dominant Frequency: 50 Hz
  • Electric Field: Although the exact numeric values were not specified in the excerpt provided, the result was noted as being within all applicable guidelines.

Even with the underfloor heating system at “full load,” the variations were minimal—indicating that the heating system did not significantly increase the existing background EMF levels.

Interpretation of Results

  1. Compliance with Limits
    According to the report’s conclusion, both the electric field and the magnetic field levels at these measurement points were below the strictest regulatory thresholds:
    • Under the Exposure Values, Attention Values, and Quality Values specified in DPCM 08/07/2003, and
    • Under broader guidelines like EU Recommendation 1999/519/EC.
  3. Practical Takeaway
    The measured values of around 0.03 µT are well under the 3 µT limit commonly cited as the maximum recommended for prolonged, everyday exposure in residential areas. Thus, Warmset presented no notable increase in EMF exposure beyond typical household levels.

Conclusion and Considerations

  • Well Within Safety Ranges
    All measured EMF values for the electric underfloor heating system in this real-world test were comfortably within the regulatory thresholds recommended for safety, and in fact practically zero.
  • One Location, Specific Date
    It’s important to note that this was a single measurement conducted at a specific site and time. Different homes, electrical installations, and measurement conditions could yield different results. Nonetheless, these findings are reassuring for homeowners concerned about EMFs from Warmset.

References and Further Reading

  • CEI 211-6: Italian guidelines for measuring low-frequency electromagnetic fields (50 Hz).
  • DPCM 08/07/2003: Provides Italy’s legal limits on EMF exposure for power lines and similar sources.
  • Recommendation 1999/519/EC (ICNIRP 1998): European-level guidance on EMF exposure limits.

For those who would like additional details, please get in touch or consult reputable sources such as the World Health Organization (WHO) or the International Commission on Non-Ionizing Radiation Protection (ICNIRP).

Disclaimer: This article presents a summary based on specific testing in a single household environment. Results may vary depending on the site, equipment, installation quality, and measurement methodology. Always consult qualified professionals for detailed EMF assessments.