Earlier quoted context omitted.
It's 4x more efficient than an electric heater, but not 4x more than a heat pump [1]. [1] https://en.wikipedia.org/wiki/Coefficient_of_performance
It still takes less energy than heating given climate differentials, so any argument that air conditioning is “garish” and “wrong” needs to be applied to heating also (and anyone living in cold climates ie. Europeans, Americans, etc). I see the argument that air conditioning is somehow “wrong” or “unsophisticated” on HN all the time (usually from Europeans) and it’s one of the weirdest things. I see no explanation fo…
At home, it recycles stale, dry air. In urban settings, air-conditioners pump hotter air into the (already) sizzling outside. There are better implementations like district cooling with cold water, but this will require ripping out every single split-aircon unit from every single flat and replacing the ducting, the cooling units, and even the controls.