A traditional sauna is a room made from softwood and that incorporates a heater — either electric or wood-burning — that is capable of reaching at least 170° Fahrenheit. A Traditional sauna offers a range of benefits starting at 140-185F+, but an Infrared sauna is also beneficial at 120-150F. An average healthy individual can tolerate that kind of heat because it is a dry environment with extremely low humidity. This is called a dry sauna experience.
However, one other integral traditional sauna component is sauna stones. These are placed in or on the heater, and when they’re good and hot, you sprinkle some water on them to create a burst of steam. This is called a wet sauna experience because it generates humidity. So to summarize, a sauna is a wooden room with an exceptional heater that is capable of producing either dry or wet heat.