electriQ - 14000 BTU Smart Portable Air Conditioner with Heat Pump (P15HPW)

AirFlex 14000 BTU 4kW Portable. £500 when new. I've had a few over the years, eventually they get feeble & need replacing. I've had this one since 2021 & it's still going strong. Quieter than some I've had before but still noisy as F. I got this one because it has a front hose as well as rear, so we don't need to run it in the room we want to cool the most. I added a second full length hose \[which they say makes it less efficient but when it's 32 in the shade, sod that for a game of soldiers\] so we can point it at any room in the house & help it along with a Dyson fan. Keeps the noise down too. Your window design sounds ideal. It should come with enough kit to poke the hose through a blanking plate that will give a partial seal. I'd wait til you try it for size before deciding if you need an additional sealing solution. Unless you can keep the vent hose really short, a bit of fresh air leakage around the edges won't really make much practical difference. If you ask any actual aircon expert they'll tell you that this single hose out the window type are very inefficient anyway - but I'm back to that earlier-mentioned game of soldiers. Edit after reading other comments - no wifi on this one, but there's most probably a model that does now. My workroom can easily hit 42°C in summer, old Victorian solid walls, one east, one south facing & just under a slate roof, so it takes some punishment. It manages to get it down to low 20s, even though I leave the room door open so I'm evening out the heat into the rest of the house. As evening falls we close the workroom in, pushing the hose out into the hallway to cool the rest of the house. Of course it's not powerful enough to get it down to chilly, but it really helps, and takes enough humidity out of the air to make the overall experience far more comfortable.

I bought a portable one during COVID for my home office because the room is in the sun all day, and with all the equipment I have in here it gets too hot. Over 30C on the worst days. It's a proper one with a hose you stick out the window, not one of the crap ones you have to load with ice which do nothing. I bought [this one](https://www.electriq.co.uk/p/p15hpw/electriq-p15hpw--air-conditioner) used on eBay for €300 and I love it. During heatwaves the past few years I've actually slept in the office room just so I would get a good night's sleep. The weather was so poor last summer I didn't actually use it but I'll have to wheel it out again this year probably.

I have a 14000btu electriQ one bought from aircondirect a couple of years ago. It’s one that has to be vented out the window. I would highly recommend them. They’re not very energy efficient, but for me, absolutely worth it. It’s important to get one with the correct BTU for the size of the room you want cooling. I used to use a fabric window kit that tapes round the window but they’re a bit unsightly, so I had a piece of clear Perspex cut with a hole big enough to fit the vent pipe out. Velcro tape it on and you’re good to go, and it’s much easier to take off and looks infinitely better.