Heat Scale is the real name of "ghost heat," which is a loaded term made up by malcontents who didn't like the system when it was implemented as a soft fix to the massive alpha strikes being used at the time.
The idea was that it was "unrealistic" to add extra heat for simultaneously firing, say, 4 PPCs and two Gauss Rifles at once - hence the epithet. It "broke immersion" and "didn't make sense." The real reason was that they didn't want the system, either because they preferred their own pet solutions, or liked the game to be broken - and were dishonestly pretending that their problem was "realism," or "immersion." I didn't mind the disagreement with the devs - but the dishonesty offended me, to the point that the term is a minor pet peeve of mine to this day. =}
However, this is definitely turning into a long answer, and is only somewhat related to the question asked...
Edited by Ekson Valdez, 19 September 2022 - 09:51 PM.