[Riiz]

So glad I swap out CO2 bottle instead of filling them, no acclimation worries, cause the tanks sit for awhile before I ever use them.

 

[Riiz]

I work a lot with air conditioning and nitrous. Generally when you compress a gas is gets hotter and when it is released the temp drops, is co2 the opposite of this?

All gases work the same way, when your compressing gases, like your example, even CO2 gets really warm. But when they fill CO2 cylinders, they are just transferring a liquid, and a little of that liquid CO2 does turn back into gas as its being filled, and that chills the tank.