Electric versus induction cooktops

if you’re choosing between electric and induction, electric is the safer option of the two.

While exposure levels will vary from product to product, an EMF testing technician has observed magnetic field readings of around 8 - 10 milliGauss in electric cooktops, and as high as 80 to 100 mG in induction cooktops (although there are products that are lower than this).

Adverse health effects have been observed at levels as low as 2 - 3 mG.

Tips for minimising health risks associated with induction cooktops

Minimise contact with metal cookware: When you touch metal cookware on an induction cooktop, you become part of the electrical circuit. Cover handles with a tea towel or choose cookware with insulated handles to reduce exposure.

Choose back-mounted knobs: Opt for knobs at the back rather than the front of the cooktop. This setup helps reduce exposure to electric and magnetic fields by keeping you at a slightly greater distance, which can significantly decrease exposure levels. However, remember that magnetic fields remain strongest directly above the coils.

This study of 913 pregnant women investigated the impact of magnetic field (MF) exposure on miscarriage risk.

  • Findings showed that women with higher MF exposure had a 2.72 times greater risk of miscarriage than those with lower exposure, even after adjusting for other factors.

  • The risk remained consistent across different MF sources, emphasising the importance of accurate MF measurement in assessing health impacts.

  • The study provides new evidence from a human population, suggesting that MF non-ionizing radiation may have adverse biological effects on human health.

Reference: Li et al. (2017). Exposure to magnetic field non-ionizing radiation and the risk of miscarriage: A prospective cohort study. Science Reports, 7. https://doi.org/10.1038/s41598-017-16623-8

Findings revealed that while most cooktops meet public exposure limits at the IEC-recommended distance, many exceed these limits at closer ranges, with some even surpassing occupational exposure thresholds.

Key risks identified:

  • User tissue can experience current density levels exceeding public restrictions, reaching occupational levels.

  • The brains of young children may be exposed to levels near the public safety limits.

  • Fetal central nervous system exposure can surpass public limits if the mother encounters occupational-level exposure.

  • The study highlights a gap between the IEC testing standards and actual exposure levels, suggesting that the current testing methods may not fully protect users, particularly when close to the cooktop.

Reference: Christ et al. (2012). Exposure of the human body to professional and domestic induction cooktops compared to the basic restrictions. Bioelectromagnetics, 33(8), 695–705. https://doi.org/10.1002/bem.21739

Concerned about the hidden risks of cooktops and how they impact health?

Understanding the exposure levels of magnetic fields is just one part of creating a healthier home.

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Zara D’Cotta is a Building Biology New Build Consultant, Keynote Speaker and Founder of The Healthy Home.

We envision an Australia where every home is a testament to health-centric design and construction. Our goal is to be the guiding light for time-strapped building industry professionals, ensuring every home designed and built under their watch prioritises the health and well-being of its occupants.