comments interspersed.

the 6,500 output is TOTAL output, which = input + heat removed.

No. The ratings are based on how much heat transfer the unit will do, not
what the output is.

ah, check it again.

When a
contractor needs to select a A/C unit

a general constractor uses an HVAC contractor which understands the issues
involved and sizes accordingly. I am family in the business long-term

Also, I used the figure the HVAC industry uses.

What do you mean by "the figure" ??


1,000 watts = 3,012 btu's.

So you are derating on some "rule of thumb" basis.

it's the number used by the industry for decades.

In your first post, you said:
quote:
"An a/c unit will use about 1,400 watts electricity input to remove every
1,000
watts of heat."
unquote.

Will you please back those numbers up?

I have family in the business long term, and that is the number used by the
HVAC industry. I also sold large scale computer systems for over 20 years and
every installation I sold, the HVAC contractor asked how many kva input my
machine required and then sized the a/c such that the a/c input was about 140%
of the computer input.

I maintain that the BTU rating of an A/C unit is a measure of its ability to
remove heat from the room, not how much heat it shoves outside.

maintain that if you want, but size the a/c as if the heat rating was a total
of input plus heat removed.

Why are you assuming an EER so much
lower?

because that's what the HVAC industry says they can do under the very best of
conditions.