What is the highest temperature that this sauna can acheive and is this also a wet sauna?

Hello Jeff and thank you for your inquiry. All of the traditional saunas (heater with rocks) get to about the same temperature, which about 200 degrees F at the ceiling. Sauna heaters are ?capped? in North America. You can always pour water on the rocks to raise the humidity level (steam). If you want even higher humidity, the Tylo COMBI heaters have a small built-in steam generator as well as the rocks. The Combi heaters can get the humidity level about twice as high as pouring water on the rocks.