Quick answer: EMF stands for electric and magnetic fields. Any electric infrared sauna produces some, because it has heaters and wiring, just like a hair dryer or a microwave. "Low EMF", "ultra-low EMF" and "near-zero EMF" are manufacturer labels for how small those fields are at the seat, usually measured in milligauss (mG). Health agencies say evidence does not confirm health effects from low-level exposure, but many buyers still prefer a model with published readings.
What EMF Is (and What It Is Not)
EMF is not the same thing as the infrared light that warms you. Infrared is non-ionizing and is felt as heat; our guide on whether infrared saunas cause cancer explains the difference from X-rays and UV. EMF comes from the electricity running through the cabin:
- Electric fields come from voltage in the wiring and are reduced by shielded cable.
- Magnetic fields come from current flowing through the heaters and wiring. These are the figures quoted in milligauss.
The World Health Organization states that, to date, evidence does not confirm health consequences from exposure to low-level electromagnetic fields. Research continues, which is why some people choose to reduce exposure where it is easy to do so.
What Low, Ultra-Low and Near-Zero EMF Mean
These terms are not regulated labels, and brands do not all use the same cut-offs. They describe how low the magnetic field reads at the seat. As one example, Dynamic's own guide, Dynamic sauna EMF ratings, describes low EMF models as typically reading about 6 to 10 mG at 6 to 8 inches from the panels and ultra-low models as under 3 mG at the same distance. Other brands may define the terms differently, so always compare the stated reading rather than the label.
The Low EMF Infrared Saunas collection groups models that their manufacturers rate as low, ultra-low or near-zero EMF.
What Affects an EMF Reading
- Distance: magnetic fields fall off quickly as you move away from the panels, so a reading at 6 inches differs from one at 2 feet.
- Where it is measured: the seat, the back of the bench and the floor can all read differently.
- The meter: cheap meters can give very different numbers from professional ones, so a single reading is not a full picture.
- Nearby electronics: phones, outlets and other wiring in the room add their own fields.
- Heater design: panel layout and wiring differ between full spectrum and far infrared designs and between brands.
How to Compare Models
- Look for a stated reading in milligauss, not just a "low EMF" badge.
- Check the distance and position it was measured at.
- Ask whether the figure comes from the manufacturer or from third-party testing, and read the manual or product page for what is published.
- Remember that EMF is one factor among size, heater coverage, wood and warranty. Our infrared sauna guide covers the rest.
Do Traditional Saunas Have EMF?
An electric heater in a traditional sauna also produces fields, and wood-fired stoves produce none from the heat source. The infrared vs traditional comparison looks at the practical differences between the two types.
Simple Ways to Reduce Exposure
- Choose a model that publishes low readings, then browse the full infrared sauna collection for size and price.
- Sit a little away from the heating panels if you want extra margin.
- Keep phones and other electronics out of the cabin; the heat is also hard on them.
This article is general information, not medical advice. Talk to a healthcare professional if you have a medical condition.
