
Midea
Duo Series
Cools large spaces well, but fragile window tabs.

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Midea or clones there of. The model with the big giant oval hose is really a 2 hose model. If you have electric heat that you pay for, get the heat pump model instead. It absolutely cranks out the warm down to -5C. Then rely on your electric heat for the coldest days.
The first rule of portable air conditioners is get a 2 hose model (or the Midea with the giant oval hose that is really 2 hoses. 1 hose hose models are an america only thing. They blow out the very air you are trying to cool. The only reason they exist is 'stupid people are confused by 2 hoses'. 2 hoses balance the pressure and use outside air to cool the condenser. They are the correct choice.
I had the exact one for a year and returned it. It never really worked properly. Maybe I got a lemon but I exchanged it to the Midea 14000 BTU and no complaints
I also have horizontal windows! I have the Midea Duo and I love it. Super quiet and efficient. The remote acts as a thermostat too. It does need line of sight and itās a bit finicky but thatās my only complaint.
i got this like last week! working great!
https://preview.redd.it/607vatri6e3h1.jpeg?width=3024&format=pjpg&auto=webp&s=f81304c9dda8d3009386b79d7e0b9f8c7978100d I have one of these too. Itās a great little heat pump. Very small footprint (13āx13ā). Itās only 8000BTU, but that works well for me. I have a 12000BTU Midea heat pump that does the bulk of my heating and cooling and I just use the Hisense as surge capacity for afternoon solar gain when the sun is streaming in to my west facing condo windows. The Hisense has a reasonably good community integration into Home Assistant. My only complaint is that you canāt silence the beep when the unit switches on / off either from an internal signal, the remote, or Home Assistant automation. For this reason I used Home Assistantās sun above / below horizon state to disable the Hisense at night. Iād rather deal with it being a bit warmer than the Hisense beeping as it cycles on/off. (See next post).
https://preview.redd.it/mxl36hen7e3h1.jpeg?width=1125&format=pjpg&auto=webp&s=8cc65276603b935719a411e9249f3cdfa417382b My Home Assistant dashboard. Itās been not that hot recently, so the Hisense hasnāt triggered and the Midea has done the base load cooling. But on sunny afternoons having an extra 8000BTU of cooling is very much needed.
I have the reversible heat pump version of this one (mineās a Midea, but the Danby is just the same thing rebadged), and itās been going solid for years. I do recommend the heat pump one though itās worth the extra cash especially if you have electric baseboard heat because itāll save a ton of electric bill cost in the winter, plus be just as effective of an air conditioner in summer. Despite looking like a single hose from the outside this is actually a dual hose unit (theyāre just nested inside eachother), so it doesnāt have the drawbacks of single hose ones. Avoid single hose, they pull the room down to negative pressure so heat leaks in from elsewhere and negates the whole point. My husband had to rig up some plywood and foam adapter to make it fit our window as the included plastic one doesnāt really work everywhere.
2 hose, same as the one OP posted, where the two hoses are nested inside one big oval shaped hose. The only thing thatās different about mine is itās a reversible heat pump, so it can heat or cool. Also itās worthwhile to put it up on a couple milk crates or something and get an automatic condensate pump from Home Depot, then connect it to the drain port on the back. A condensate pump is basically a little bucket with a float in it so it pumps out the condensate for you into a nearby sink (or outside or whatever) whenever it gets full. Without that youāll be constantly emptying the built in water tray bucket thing. The top end portable units have a built in pump for that but Iāve never seen them on sale anywhere.

Midea
Duo Series
Cools large spaces well, but fragile window tabs.

Midea
4-in-1 PortaSplit 3.5 kW Portable Air Conditioner and Dehumidifier
Energy-efficient split system, but bulky with frequent drainage.

Midea
PortaSplit 8K
Powerful split system, easy setup, but needs frequent draining.

Danby
14,000 BTU (12,000 SACC) 3-in-1 Portable Air Conditioner with Inverter - Dual hose / Remote / Wi-Fi (DPA120CBIMBDB, DPA120CBIMBDB-RF)
Very durable, long-lasting, smart Wi-Fi control.

Whynter
ARC-1230WN
Efficient, dual-hose, no water draining, with Wi-Fi.

Ranked #1
Midea - Duo Series

Ranked #1
Midea - Duo Series

Ranked #1
EcoFlow - WAVE 2 Portable Air Conditioner