I've seen EERs or SEERs in the 20s, like the very expensive Mitsubishi
mini-splits, w/ inverter technology--essentially variable speed compressors.
Bull?

How would someone actually measure and EER in the field? An amprobe and a
thermometer? And then mass-flow, no?
Not so easy.
--
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Mr. P.V.'d (formerly Droll Troll), Yonkers, NY

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"Richard J Kinch" wrote in message
. ..
Joe writes:

A 16 year old AC probably has a relatively low EER by today's
standards.

Bunk. Efficiency became an issue in the 1970s after the energy crisis
and monetary inflation. Efficiency improvments were mostly in place
during the 1980s. Improvements in true efficiency since the 1990s have
been minimal.

Thermodynamics is a dismal science, and the law of diminishing returns
applies to efficiency improvements. The low fruit has been picked for
decades.

Now, the AC salesman will tell you that anything you *have* is woefully
out of date and inefficient and you will just *make money* by spending
$$$$'s on his new system. But he won't actually write down any promise
of savings, he will only puff.

Ask the salesman of the "more efficient" system for an actual efficiency
promise in terms of dollars, amperage, temp differential, air flow, or
other quantitative performance measure. Not some cooked-up government
SEER number that is literallyl *impossible* to verify in the field, but
actual measurable numbers. Tell him you're ready to buy but you won't
pay until the system is installed and the measured performance meets the
promise. See how his puffery is deflated.