These units are used quite extensively in the rest of the world.
I have been in many homes in other parts of the world and they work quite fine.
Central Air conditioning is used extensively in the US.
I don't see the need to cool the whole house (here) when most of the time folks spend their time in basically 3 rooms.
Some of the fancier homes are zoned so not necessarily cooling the whole house.
The same place sells Monitor and Toyotomi kerosene home heaters. I wish I had installed these when my place was constructed.
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