My game is updated to 42.3, and the patch notes said we have switched to Kelvin but I don't think so...Kelvin does not go into negative numbers as it does in TPT.
The temperature is said as "(number)*C" instead of "(number)K"
Otherwise it's fine, we aren't able to reach absolute zero.
It would be nice to switch between kelvin, Celsius, and Fahrenheit.... Wouldn't be hard to implement I would think.