1895
Ancient Iran had air conditioning
(lemmy.world)
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This is obviously an objective criteria, so the mods are always right. Or maybe mildly right? Ahh.. what do we know?
Just post some stuff and don't spam.
Cooling a ware house, lecture hall or mall is very different from cooling an apaprtement building. In particular because most of the former have been designed with AC in mind.
Not beyond the hard limits of physics. You are not going to retrofit an appartement building built in 1900 or 1970 or 2000 for that matter with an efficent heating/cooling system without major rebuilding.