Stormin Mormon writes:

You, on the other hand, post a highly technical writing on the subject
which turns out to be incorrect.

I agree with the authority you quote. Your rendition is confused.

Which all suggests that you are an
engineer, not a HVAC man such as myself.

Agreed, if by "HVAC man" you mean someone who can't tell cooling from
energy, or BTUs from BTUs/hour. Kind of like the garage mechanic who puts
"pounds" of air into tires.