Before Buying Any Sauna,
Ask These 3 Questions About EMF

1) Ask for the maximum electric field found at the surface of the heater, measured by a reputable third-party independent company.  Is it higher than 100 V/m?

If they cannot show you a third-party report, then it means they got one and didn't like the results.  Only very low-end saunas do not get their heaters tested, and those saunas always have high EMF.

If they show you a report, but do not include the maximum value found at the surface of the heater, then they have cherry-picked the points for measurement.  The results cannot be trusted.  Third-party test reports will indicate if they looked for the maximum.   

If the maximum electric field is above 100 V/m, then the level is above the recommended maximum.  Nearly all heaters naturally have an electric field at the surface of the heater at least 17 times higher than this recommended maximum.

The NCRP (National Council of Radiation Protection and Measurements) provides the recommended maximum electric field exposure to be less than 100 V/m.

“An exposure guideline of 1 μT (10 mG) and 100 V/m: A considerable body of observations has documented bioeffects of fields at these strengths across the gamut from isolated cells to animals, and in man.”

— From the NCRP Guidelines and quoted in EMF measurement reports from Vitatech Electromagnetics

2) Ask for the maximum magnetic field found at the surface of the heater, measured by a reputable third-party independent company.  Is it higher than 10 mG?

If they cannot show you a third-party report, then it means they got one and didn't like the results.  Only very low-end saunas do not get their heaters tested, and those saunas always have high EMF.

If they show you a report, but do not include the maximum value found at the surface of the heater, then they have cherry-picked the points for measurement.  The results cannot be trusted.  Companies will never pick the maximum point as the example for measurement.  Third-party test reports will indicate if they looked for the maximum.  Every panel heater we have tested has a magnetic field hot-spot on it where the power is connected to it -- that hot-spot must be included with every measurement. 

If the maximum magnetic field is above 10 mG, then the level is above the recommended maximum.  Even heaters with magnetic field mitigation typically have a hot spot that is at least 2 times higher than this recommended maximum.

The NCRP (National Council of Radiation Protection and Measurements) provides the recommended maximum magnetic field exposure to be less than 10 mG.

“An exposure guideline of 1 μT (10 mG) and 100 V/m: A considerable body of observations has documented bioeffects of fields at these strengths across the gamut from isolated cells to animals, and in man.”

— From the NCRP Guidelines and quoted in EMF measurement reports from Vitatech Electromagnetics

3) What frequency is the electricity powering the heater?  Does their heater operate at the frequencies it was tested at?

In other words, if they power their heater with DC power, then the fields must be measured at 0 Hz.  If they power their heater with 50 Hz or 60 Hz power (standard wall outlet power), then the measurements must be made from 50 or 60 Hz up to at least 300 Hz or more.

That is all you need to know!  If a company cannot answer those questions or qualifies the results, then you know there is cause for concern, and you know their heaters emit significant amounts of EMF.

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