Earlier quoted context omitted.
Don't get the portable ones. I made the mistake in 2019 and the thing is abysmally loud, barely gets the temperature 2 degrees lower in a single room, uses twice as much electricity as the rest of the household combined, and you still can't work from the heat and noise. That's with a window replaced by an insulating panel with a round cut-out for the hose, not a cracked window like you see most people needing to do.…
A lot of people are renting in UK now, so they will need permission to install a perm one?
I'd never again move anywhere above ground floor without some form of cooling mechanism, though I've also always been more affected by heat than others seem to. I'll pay basically any premium for this. Currently very blessed with a naturally cool ground floor apartment. The cold in winter I can deal with using clothing, heating blankets, and of course some base heating level, that's all not so difficult nor expensive