A conventional sauna super heats the air which heats the outside of your skin this extreme heat 180 240 f is hard on the respiratory system eyes and carries warnings for heart conditionsr a far infrared sauna is like a gentle heatwave and operates at between 100 120 f infrared waves penetrate 1 inch into the body causing toxins heavy metals and poisons to be released from our fat and water cells through our sweat approximately 20 of this sweat is made up of toxins compared to 2 3 in a