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This El Niño is going to be something
(thelemmy.club)
Hold on to your butts, comrades. We're about to get a preview of 2050. I just checked the live data, and the area off the coast of South America that is the index water for ENSO is 9° F above average in places. This is going to be a wild year.
one would hope the prices come down, but the common "window units" in the US just basically sit in a window.
the kind of window where the bottom half slides up. thats where you set the window unit, on the window sill, and then close the top on it. then it has some filler piece that expands to the sides to close the gaps, but you can stuff anything in there. it releases heat (using a heat pump) outside the window and cycles air from inside the house that it cools.
it can be surprising how effective they are, but one unit typically handles enough air to cool a single room. so shutting doors or hanging fabric helps.
no holes in walls are needed, and the thing plugs into an outlet inside the house.
if i were some kind of guy who had a boat load of cash, i would be filling shipping containers with them and US/EU power adapters, because an entry level, small window unit here is under $200 USD. and oftentimes, one cool room is all you need to make it through a heat wave.