Sometimes “R” is a step-child such as when “R” is an after thought such as “HVAC (Slash) R” as in HVAC/R, as in “oh, yeah, we almost forgot to mention refrigeration.”
Even many of the HVAC contractors want nothing to do with “R.”
Well, finally, someone has come up with as clear-cut of a definition as you are going to find. During the FMI Energy & Technical Services Conference a couple of months ago, the following was offered during a technical session.
Commercial Refrigeration:A science of vague assumptions based upon debatable figures taken from inconclusive experiments performed with instruments of problematical accuracy by persons of doubtful reliability and questionable mentality.
I will choose not to ID the presenter of that quote unless he wants to step forward and take credit - or blame. I suspect he had tongue firmly in cheek. But, frankly, as one in the refrigeration sector, I sees some validity in the definition especially in terms of the “questionable mentality,” when applied to me.