alt Hacker NewsThe difference in ambient temperature due to air conditioning pumping heat outside is unmeasurably low. If all the power a city uses went to AC, it'd still be negligible compared with the sun irradiation on its surface.
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thayne • today at 5:10 AM
Over the scale of an entire city, it might be negligable, I don't know, I haven't done the math. My guess would be it is measurable, but not a lot, probably less than a degree. But the GP said "no it doesn't" increase heat. I'm just saying that even if it is a very small amount, it does increase heat.
And if you stand near an AC unit, you can definitely feel heat coming from it.
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1c to 2c according to simulation in Paris, even up to 3-4c for some streets
The exhaust of a single car/plane/ship are also immeasurable, yet here we are...