AEG (Electrolux Group) - Comfort 6000 Portable Air Conditioner A (AXP34U339HW)

You did the right thing. I kind of regret getting this, it doesn't quite cool down my room (47 m2). I'm not saying it doesn't have an effect, it does, but it's not as good as I'd expected. On the flip side, I haven't been able to completely seal the window that the exhaust runs out of. It's only been a day, hopefully things get better with better isolation.

We have 2 AEG Comfort 6000s to cover our 3 bedroom flat. Absolutely brilliant piece of kit, highly recommend them. They’re not cheap but after the first one I got was broken from the get go (and then the replacement was too) I didn’t want to mess around with cheaper ones.

We got the AEG Comfort 6000 Air Conditioner last summer due to our flat being a good 10 degrees hotter inside than outside and then just some random window adapter kit we bought off of Amazon. It’s a portable one as we couldn’t get a proper one installed in our listed building. The vent just has to go out the window. Does pretty well at cooling down a 3 bed flat. Obviously it’s cooler in the room it’s in (the living room) than the bedrooms but still makes a noticeable difference.

Screwfix are pretty decent so should do for ops price range. Lots of sales on frequently enough too.  If OP could stretch then I'd say AEG as I bloody love mine. Was in same place and splashed a bit more after a horrible night of don't touch the air surrounding me arguments the other summer.  Been bliss ever since.  For the window, you can get little kits off amazon where you put some double edged velcro tape 9nto your window and put this plastic sheet around, let's you chuck the thing out the window and keep the room fairly sealed.  You can also get extensions for the tubes easy enough too, which is great of you only have that small top window or can't put it near the window. 

Yes.. I went for an AEG a couple of years ago. I didn’t fancy the zip up window seal, so ended up getting an acrylic window panel from these people : https://plasticsheetsshop.co.uk/applications/window-sealing-air-conditioner/ I sent them the dimensions for my window frame and where I wanted the exhaust hole to go. If I want to use it, I open up the side window, attach the acrylic panel to the frame using heavy duty velcro, and then push the aircon exhaust hose out of the hole. I measured it to be a close fit, to stop hot air coming back in. I also had to superglue some little plastic handles onto the panel so I can actually remove it again - the heavy duty velcro is pretty strong. Just wanted to mention another option.

I bought an AEG unit a couple of years ago and it was the best £300 I spent. Once it gets going it keeps my bedroom at a nice and cool 21C and I can turn it off using Alexa which in the middle of the night is really nice - although be aware most Aircon units do munch electricity. I have wondered when my gas boiler dies if it's more efficient to get a Bidirectional Heat Pump fitted to the house, bearing in mind most heat pump units are (very simplistically) Aircon units running backwards (so to speak) - one that gives me heating in the winter and then AC in the summer?

If you can buy Midea Duo PAC which is a dual hose portable ac definitely worth it. If not you can get an Electrolux(AEG) one and make it simply dual hose with a 3D printed back side. Split ACs are simply unbeatable. They could be also used for heating too. But the installation costs etc are not small in UK I believe. Mitsubishi, Daikin, Midea are great for split ACs. You can also dehumidify your house with ACs. I am not living in UK but I'm a renter so I have a PAC in my bed room but luckily my living room had a split AC. We have very bad humidity in the summer

We used to have a Meaco one from Costco within that price range, and that broke within a year. Since then we tried an AEG one which was terrible, and now have a De’Longhi Pinguino. It looks like Currys have a couple near your price range. We also have a still working De’Longhi dehumidifier which is probably old enough to vote, and so while now I’ve praised them on the internet I’m sure they’ll both break immediately, I have some faith in the brand. Would definitely suggest considering spending a little extra on one of the Pinguinos if you can.