Infrared is part of the electromagnetic spectrum and as a wavelength range from .75 to 1000 microns. It is below (longer) visible red light and above the microwave and is detected as radiated heat. With-in this spectrum we have Near, Close and Far (FIR). It is the FIR spectrum that an infrared sauna heater targets. The intensity is measured in watts/square meter. Distance from the source effects the intensity in an inverse relation ship squared. Thus, if you double the distance from the source the intensity will be reduced to ¼. The panels produce 300W of radiated heat at the source, and the effective radiating surface is approx. 16 x 28 inches =448 sq-inches = 0.289sq-m. Thus, on a sq-m basis the intensity is approx. 1,550 watts/=sq-m. However, this emittance radiates out in both the forward and backwards direction and with a reflective layer at the back, about 80% is in the forward direction. The only other EM frequency that is emitted is that arising from the 60HZ AC current that flows through the panel.
About Electro-Magnetic Frequencies
Our infrared sauna panels produce radiant heat in the far infrared spectrum. Its in the same spectrum as the heat that you feel when you stand near a warm body such as a stove and is even what your own body gives off. The panel produces 300W equivalent radiant heat or approx. 1500W/sq-m in this spectrum. EMF is not a dirty word in this case. It stands for Electro Magnetic Frequency and infrared is part of the total range of frequencies that are possible. Our Heaters emit a Wavelength of 5.6 -15 um which lies at the lower end of the FIR infrared spectrum. Far infrared heaters do not glow red. The intensity at the source is approx.1500W/sq-m and intensity drops off inversely with the square of the distance from the source, as happens with all EM radiation.
Occasionally we get asked to supply the EMF for our IR carbon fiber heating panels. EMF or electrical
magnetic field is present in all electrical devices from your phone, TV, computer etc. All electrical devises
give off EMF. Our Carbon fiber panels were tested for EMF and based on the extended wavelength given
off in an IR panel, the EMF as measured by using the Single Beam test was between 5.6 -15 mG (milligauss). To give comparison a laptop computer can be as high as 100 mG.
