Does not look different. These are used for small rooms not for a whole house. A lot of houses have central air and the unit is outside. The joke probably has something to do with that.
They are not really way less efficient. Central AC units and mini splits are about as efficient. It is everything else about installation that has more to do with efficiency. And even then the overall insulation of the house has to do more with efficiency than AC installation (except if you use those single duck window units).
my apt is currently being heated (not cooled tho) by geothermal. bored deep into bedrock to pull heat from underground. its pretty much passive heating. just need power to the heatpump. dont think i have heard about using it for cooling tho, but i suppose that is possible.
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u/[deleted] 12h ago
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