
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 it’s a bit finicky but that’s my only complaint.
i got this like last week! working great!
I have 2 of the Midea units. One for my main living area and one for a room above the garage. It was 98F here today and it kept the main living area at 70F, which is what we had it set to. Main living area is about 1100 sqft. The room above the garage is 550 sqft and it’s where we work out so we set it to 60F and it got it down to 65-67F. That room is not as well insulated as the main space. I’ve had them for 2-3 years now. They are very quiet.
I have the midea and had to RMA my first one which was a HUGE pain. The plastic bits that attach to the window insert are super delicate, i've broken all 4 tabs and have resorted to duct taping to the window. When it's running it's great and the app support is awesome. I wouldn't recommend though

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