On Tue, 22 Oct 2019 17:17:39 -0700 (PDT), trader_4
wrote:

On Tuesday, October 22, 2019 at 5:16:19 PM UTC-4, Commander Kinsey wrote:
On Tue, 22 Oct 2019 20:43:19 +0100, trader_4 wrote:

On Tuesday, October 22, 2019 at 2:32:30 PM UTC-4, danny burstein wrote:
In op.z92p4mxowdg98l@glass "Commander Kinsey" writes:

Just had a reply elsewhere that said the USA 13 minimum SEER only applie=
s to split units, and that most single units are much lower. Any reason=
why split units would be more efficient?

A bunch of reasons:

1: "mini split" units tend to be inverter controlled,
with variable output cooling/heating. There's more
efficiency with a five degree temperature drop [a]
than a 20 degree one.

2: the mini splits aren't wasting energy pumping all
that air around through ducts. Also, less leakage
in places where, well, the conditioned air is leaking..

I assume by single units the poster was referring to window units,

It's not a window unit, it's not shaped to fit a window. But it has one inside part and one outside part, so works in the same way.


Well, IDK what exactly you had. But you and Danny were comparing it to
a mini-split. A mini-split can and often is just two pieces one inside,
one outside. Some will support more than one inside unit. So, what you
say isn't a mini-split sounds like one to me, so far.

It could be a wall pack like you see in motels, A Bard Wall hanger
like they use on construction trailers or a ducted package unit like
you see in a mobile home.
They can be pretty efficient, the government just doesn't say they
have to be.