Ultra-Low EMF Far Infrared Sauna Heaters Trifield EMF readings 17.7 mG at the heater4.6 mG at 1 inch1.8 mG at 2 inches 1.8 mG at 3 inches 0.4 mG at 4 inches 0.2 mG at 2 inches 0.2 mG at 6 inches
