Spécification Techniques

FAR INFRARED – the real technical stuff
 
The electromagnetic spectrum is divided into three segments by wavelength, measured in microns or micrometers (a micron = 1/1,000,000 of a meter) : 0.076 to 1.5 microns = near or close; 1.5 to 5.6 = middle or intermediate; 5.6 to 1,000 = far or long wave infrared. The far infrared segment of the electromagnetic spectrum occurs just below, or "infra" to red light as the next lowest energy band. This band of light is not visible to human eyes but we can, however, feel this type of light, which we perceive as heat. When warmed, the earth radiates infrared rays in the 7 to 14 micron bands with its peak output at 10 microns. Our palms emit infrared energy at between 8 to 14 microns. The ceramic infrared sauna heaters emit the majority of their output in the long band from 5.6 to 25 microns. The output is evenly spread around the 9.4 micron pivot point of peak human output. The energy output from the infrared sauna corresponds so closely to the body's radiant energy that our bodies absorb close to 93% of the infrared waves that reach our skin.

Sauna ventilation
 
Means two things:
1. Air circulation within the room
2. Air circulation in to the room and out of the room.
 
There are two ventilation methods: Natural and Mechanical.
 
Natural ventilation, as the name suggests, relies on natural airflow for the air exchange. This method is best suited for small-to-average-size saunas and all wood burning units.
There should be a vent underneath, or very near, the heater for fresh air intake. The heater pushes hot air up creating a vacuum underneath it that sucks fresh air in. There should be a high vent in the opposite wall or corner from the heater, where the air is allowed to escape. This vent should be 6"-18" down from the ceiling. In larger saunas (2) intake vents in opposite walls and (2) exhaust vents on opposite walls may be required.
 
Mechanical ventilation relies upon machines to, either, introduce air into the room or remove it from the sauna. Fresh air can be blown in above the heater or near ceiling to mix in with hot air rising from heater, or air can be sucked out the bottom of the room across the room from the heater. If air is sucked out then fresh air from the intake (above or under heater) will be sucked in.