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Re:Chip shortage leads carmaker Opel to shut German plant un... by ok123456 on Thursday September 30, 2021 @05:26PM (#28711510)
No parasitic power losses and it's one less system that needs to be maintained.
Re:Chip shortage leads carmaker Opel to shut German plant un... by tms2x2 on Friday October 01, 2021 @10:11AM (#28718655)
AC is used for windshield defrost. I remember waiting for heat to defrost the windshield so I could see. AC defrost works in 10 sec.
Re:Chip shortage leads carmaker Opel to shut German plant un... by nikau on Saturday October 02, 2021 @08:17AM (#28728011)
The power loss from an AC compressor with the clutch disengaged is negligible.

Modern AC also use variable displacement compressors which adjust load according to temperature, so once the cabin is cool they use a constant small amount of engine power rather than toggling to full power on and off like older designs.