Most adults will suffer third-degree burns if
exposed to 150 degree water for two seconds.
Burns will also occur with a six-second
exposure to 140 degree water or with a thirty
second exposure to 130 degree water. Even if
the temperature is 120 degrees, a five minute
exposure could result in third-degree burns.
75°C is definitely ok for a hot tube for a short session.
Temperatures beyond 50°C are an acute risk. 75°C can cause lasting damages.
Ever been to sauna? Especially the Russian one? There’s no risk if you don’t have heart issues.
I’m regularly going to a Finnish sauna with >80°C, but air with 100% humidity is not the same as immersing yourself in scalding hot water.
The Finnish sauna is dry. Russian and Turkish are wet with high humidity.
Forget 75°, just 65°C (150°F) will give you third degree burns in 2 seconds:
(°F)
I guess I’m long dead, lol.
Sure but you can only do it once!
Seriously, even 75C water coming out of the tap would be dangerous and negligent.
It’s usually 96 if you have a boiler. No issues.