I luv this math related stuph here

All estimators are based on watercooled and aircooled systems.
Someone (lots of people here) who have subzero what he/she should do??
I know that you don't have a subzero but I am wondering how can I/we get the most of this program.
I mean I know that predictions sometimes are rather correct as I used former versions of the bible for some own testing, but did you do anything for this in addition?
iirc some things were not able to work with negative temps(don't ask me which one it's way too long ago ), or am I remembering wrong?