12000 BTU Portable Air Conditioner

We have [this one](https://www.aircondirect.co.uk/p/1243753/12000-btu-portable-air-conditioner-for-rooms-up-to-30-sqm) (they also do a refurbished on) which I bought in the hot week in earlier in the year when it tbf was a lot cheaper. I had a flashback to living in our house and trying to work with an internal temp north of 30 degrees and didn't want to do another hot summer like that. Yes it's massive and loud probably about the same as a large fan, yes it has stupid hose and the window kit we got isn't amazing. If we only wanted to cool our bedroom we could have got a much smaller one. But it's very effective, we have a not very efficient set up with the hose out of our bedroom window on one side of the house and the unit angled into the hallway and it manages to keep the temp of our entire upstairs down to very comfortable level. As a test we kept it on from 11am to 11pm one day, and it added £2 extra to our electricity bill. We don't actually need to have it on constantly, we switch in on for a couple of hours, then turn it off and repeat as needed through the day. The biggest benefit is that it cools our bedroom down very quickly once the sun has gone in, which means we can sleep without being giant sweaty messes.

We've had a couple over the years, the main things to consider is where you're exhausting the hot air, make sure you have a suitable window or plan for really hot days. They're usually upwards of around 80p-£1 per hour to run. They actually do work in my experience, we survived the 40 degree summer 4 or so years ago with the help of a portable unit, it was an Electriq one from Aircon direct. As others said, they're quite loud when going at full whack.

Well I've just checked the one we had (12000btu) and it's 3.5kWh...

I bought an Electriq one from there too about 5/6 years ago - a massive in-window unit that's about 12000BTU / 3.65KWh (that's at absolute full cooling and fan speed). Usually runs at much less than half of that and costs around £1-1.50 to run at night to keep the bedroom nice and cool.