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A comment on Heat pumps of the 1800s are becoming the technology of the future. Parent comment

Re:Heat pumps of the 1800s are becoming the technology of th... by _benedict on Monday January 16, 2023 @04:18PM (#34405608)
Pretty sure mini splits are significantly more efficient today, with SCOP of above 5, so that seems unlikely?
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Re:Heat pumps of the 1800s are becoming the technology of th... by rootusrootus on Monday January 16, 2023 @04:35PM (#34405796)
I recently replaced my [central, ducted] heat pump, and the new one is rated with a 4.981 SCOP. It's fairly efficient, but not the most efficient on the market.
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Re:Heat pumps of the 1800s are becoming the technology of th... by fifteenforty on Monday January 16, 2023 @04:39PM (#34405830)
-40% for the duct heat loss
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Re:Heat pumps of the 1800s are becoming the technology of th... by rootusrootus on Monday January 16, 2023 @06:03PM (#34406705)
That seems kind of high for insulated ducts, where does that number com from?
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Re:Heat pumps of the 1800s are becoming the technology of th... by fifteenforty on Monday January 16, 2023 @06:18PM (#34406881)
US energy.gov
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Re:Heat pumps of the 1800s are becoming the technology of th... by dahfizz on Monday January 16, 2023 @07:39PM (#34407630)
It would be nice to actually link the source[1] (PDF).

The stat is that you lose between 25-40% efficiency for "typical" existing installations. The document goes on to explain that an insulated duct which doesn't leak doesn't have this kind of efficiency loss.

[1] https://www.google.com/url?q=https://www1.eere.energy.gov/bu...

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Re:Heat pumps of the 1800s are becoming the technology of th... by fifteenforty on Monday January 16, 2023 @04:34PM (#34405789)
This unit runs at about 5
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