Midea Duo 14,000 BTU (12,000 BTU SACC) High Efficiency Inverter Ultra Quiet Portable Air Conditioner, with Heat up to 550 Sq. Ft., Works with Alexa/Google Assistant, with Remote Control & Window Kit

I have now purchased two Midea Duo 14,000BTU units. They both had mechanical issues on first use which I had to investigate and resolve. After that they have both been phenomenal. I would not buy any other unit, because I have bought other brands and theirs cannot hold a candle to Midea. See below for Midea issues as well as praise. Note: these Midea units have a large rotary fan which is held by a massive rubber… grommet? rubber… bearing? at only one end of the rotary fan. The fans also have a unique structure cast inside of the rotary fan (presumably to help draw air from one chamber to another within the ac unit). This unique fan structure and unique mounting of the fan requires Midea to counterweight the fans with metal weights at the factory. This style of fan has also lead to vibration and potential self destruction in these units. But when it works it works well.Praise: The unit itself is phenomenally well made, incredibly well thought out. Every detail has been planned for and the instructions are clear. The build quality is very good, form factor is excellent too. The Midea app is great and integration with the new device was seamless. The install video is great too.The ac works wonderfully well. Heat mode works phenomenally well and is super quiet. Heat mode does not require reconfiguration or any particular preparation other than hooking up the drain line. I used the included drain adaptor to run a 1/4” black silicon line to a glass gallon jug for heat condensate drainage. The Midea Duo 14,000 BTU unit (with heat) has an internal pump that pumps out condensate from heat mode. This is very helpful.Issues; Within a minute of turning on my first unit, it made a HORRIBLE persistent rattling sound. The compressor/cooling lines were rattling against each other. I was able to get in where these lines were and slide the vibration-dampening sleeve that was already on one pipe, further down the pipe, so it would actually keep the pipes from rattling against one another.My second unit (after sitting for 16-24 hours as it should) made a high pitched metal-on-metal squeaking sound emanating from the compressor when I turned on the ac. I immediately turned the unit off, pondered for a bit, then ran the unit in heat mode, this immediately resolved the metal-on-metal squeaking issue. It now runs perfectly in heat or cooling mode.P.S. These units do make a high pitched whine sometimes, but most people will learn to tune it out.Do not attempt to repair these without some knowledge and caution of these sorts of things.P.P.S. This unit replaced a Whynter ARC-14S that was much bigger, louder, had no heat, and finally, it did not work well. So Whynter went back!Edit Jan 2023:This unit is 8 months old and now periodically emits a loud buzz and does not work. I believe the compressor is freezing up. The issue occurs a few times a day, sometimes once a week. Midea Customer Service asks silly questions and marked my ticket as "Solved" when I failed to reply within 5 days (including weekends). Not impressed. I am now seeking a replacement or refund if possible.Edit Jan (late) 2023: Midea customer service refunded me for the malfunctioning unit. I am a little concerned that it was not worth repairing a $700 unit, and now I must pay a $60 disposal fee for freon containing devices in CA, but overall I appreciate Midea’s customer service.

Edited to add: TAKE THE 15MINS TO *READ* THE INSTRUCTION BOOKLET. I NOTICE TOO MANY COMPLAINTS THAT ARE A VERY CLEAR OVERSIGHT & CAN BE RESOLVED BY THE SIMPLE SETTING(S).****TIPS FOR TEMP****Yes. So I've learned that it runs MUCH COLDER, LONGER when the filter is cleaned once a week. I literally spray it off (out) with my kitchen sink hose and it's quick and easy. Next, use a swifter duster and remove any buildup from the lower part vent exterior. The first time I did it I was in shock at the big piece of dust that slid off... that alone reduced the temp at least by 10° immediately. Next, on the very bottom in the back there is a screw off nozzle. Then pull out the rubber insert WITH A DRAIN PAN UNDERNEATH, this is the condensation that must be drained every once in awhile. I do mine every few weeks, its minimal and quick. Reinsert that rubber fitting and screw back on the round plastic cover so it's sealed when done. While I'm at it, I always run the dehumidifier afterwards with the hose it came with into a small few gal Rubbermaid bin. I set a timer because it's actually overflowed when I forgot to dump it and left it running. I will run/drain the dehumidifier for at least 5mins during all of this maintenance and while in cycle I'll switch it to cool and the water rushes out (fully draining, quick) this seems to reduce the temp drastically again for another several weeks without reduction. Make sure you carefully remove that hose, reinsert the rubber fitting and screw back on that cap. Oh and the dehumidifier is the one halfway up on the back. The directions tell you all of this but I had to read it a few times to fully understand since I'd never had one before. Also if the display ever reads a code, there's a reason and it tells you in the manual. That's how I learned about the drain at the very bottom. Hope this helps you and others. Happy to help!Original Review...I'm very please with this portable air conditioner. I was able to set it up and getting running very easily, alone. It's been running for about 15mins and my large room has already dropped from 91° to 74° it's amazing and I highly recommend this unit after hours of Amazon research and this final decision. As far as the noise, WHAT NOISE? Its an air conditioner and I hear the fan gently blowing nice cold air... if youre looking for silent, good luck. This is the quietest I've ever heard and will sleep peacefully without question. BUY IT, YOU WON'T REGRET IT.