Midea DUO Smart Inverter 14K BTU Portable Air Conditioner with Heat

I have the Whynter-branded version of the Midea Duo and it works great! Its super quiet, sips electricity, can be run in on a much lower power setting if you have a small inverter generator, and it has a massive heat output to a point. The limiting factor to the heat output for ANY heat pump is where its cutoff point is. For the Midea duo and the rebranded versions, it is around 35f outdoor temperature. Heat pumps absorb heat from outside and pump it indoors. This means that the coil that absorbs heat from outside will struggle once it gets cold enough that water in the atmosphere will ice up the internals to the point where air cant pass through the coil. The unit is actually able to run what is called a defrost cycle to de-ice the coil but when it gets very cold out and the unit struggles to keep itself from icing up, it will become overwhelmed and is no longer able to keep up while still running efficiently and or supply sufficient heat. This unit is ideal for areas that don't super frequently have far below sub-ambient temperatures and have a back-up heat source like electrical baseboard heating or a boiler. It just requires a little bit of knowledge on what limits these from working but the fact that the unit is only using on average of 800w-1050w to generate about 3-4 times that in heat is amazing and will save you lots of money in the long run. Im even able to use this unit in Chicago because I will switch over to the boiler once I notice the unit shutting off, attempting to defrost too often, or the temperature starts to drop. What I would like to see is more control over is how and when the unit shuts off when it's too cold out. A push notification to tell me to switch over from my supplemental heat to my boiler would be nice and perhaps if i could tell the unit to simply not attempt a restart for heating for a set amount of time if its too cold out so it doesn't keep restarting the compressor for no reason.

I purchased this about 2 months ago as a backup in case my 22 year old central air went out and also to have an air conditioner that I could run my 2250 watt generator with if we lost power for any length of time. When I plugged the unit into my killawatt power tester, the unit was pulling between 500 and 700 watts of electricity. This is well within the load that my generator will handle. The unit actually does a good job of cooling our 1300 sq. ft. house when the outside temperature is 95 degrees. The inverter varies the compressor. When I first start the unit up, the temperature of the air coming out will be about 40 degrees. As the temperature in the living space is lowered closer to the unit setting, the temperature of the air coming out gets closer to 50 degrees and the killawatt usage gets down to about 500 watts. This unit is very efficient. I couldn't believe how good of a job it could do in cooling my whole house. The bedrooms at the back of the house are not as cool as the area where the unit is installed, but I can live with them being a little warmer. My only nit pick would be that the unit does not control the humidity as good as the central air does. Overall, I am extremely satisfied with this unit and would buy it again in a heartbeat.

So far it's been cooling really well. Of course the inverter technology is really nice. One really nice feature is it will actually fully turn off if your room gets to the set temperature. And when it gets too hot again it will turn the fan and compressor back on to cool it. My only complaints I think are software related. It has some really weird fan curves, sometimes it ramps up to high then goes back down causing me to wake up in the middle of the night from sudden changes in sound. Sometimes when the compressor kicks on it shakes the whole unit for a quick second also causing noise from the hose shifting. Also when it runs fan-only it has that same issue as other units where it's very musty smelling. The app is has that cheap Chinese feel and isn't polished like the LG app. Still not a big deal but just something to be aware of. Most of the complaints are software/firmware. Still highly recommend and is on-par with the LG dual inverter

I bought this unit because I have a condo without central air and it gets stuffy and I get hot in my bedroom, I use the fan and air conditioner regularly. However, it has been cold lately and apparently, the unit will not work when it is colder than 45 degrees F outside. So I basically was sitting in an icebox in my bedroom, pretty lame that the heater doesn't work when it's cold outside, I think the coldest was like 37, but was 41 when I woke up and still could not get it to turn on. Also, the water draining is a little cumbersome and I am not even sure which drain plug does what. Also would have been nice if you could have had the drain hose go with the vent to the outside. Smart features are ok, the remote and app sometimes battle out, so you have to power cycle with one or the other to get it to work properly. Also the auto mode is kinda wonky sometimes, it will start up like a jet engine just to turn down in like 15 seconds, a few times I woke up from sleep thinking someones chevy was driving through my window.

Man, I was really really hopeful when I found this unit. Seemed like it was exactly what I needed, heat/AC in one unit. AC worked great all summer, temps got over 100 several times. The major problem is the heating ability, the majority of the country gets below 45 degrees in the winter. The heater simply won't work when it is below that which renders it completely useless making me use a separate space heater in the small building. This is a side the fact that my unit wouldn't pump the water out and was leaking making me go through a replacement process. I will be searching for another option. Pretty disappointing.

Despite not saying it anywhere, this product won't operate if it's below freezing temps outside. You'll get an abnormal "P9" Cold Weather Protection error if you go through and "check" the device. Upon calling customer service, they informed us that the heater won't heat if it's below 32 degrees outside. The heater won't heat if it's cold outside.... Next they'll invent a light bulb that doesn't work at night. That said the air conditioning portion of the unit is fantastic. Super quiet. I wouldn't actually recommend this but I'm marking it as if I would because they've got to be filtering comments on this.

Unit Operating Temperature Range: Mode Temperature Range Cool 16°C ~ 35°C (60°F ~ 95°F) Dry 13°C ~ 35°C (55°F ~ 95°F) Heat Pump (for heat model) 5°C ~ 30°C (41°F ~ 86°F) The information above is extremely important. This unit works great if the outdoor temperature is within the operating temperature range. Once the temperature gets to 45°F the heater will struggle to blow hot air, and after the temperature gets to 41°F the heat pump will not start at all. The unit was designed to function this way. This unit also struggles to blow cold air once the temperature gets above 88°F, but the unit will continue to operate regardless of how hot it gets outside. Do not purchase this unit if you plan to use it in temperatures beyond the operating temperature range, because it simply cannot do it. In my experience, it seems to be more sensitive to the temperature inside the hose than the temperature inside the room. If I heat up the room with a separate heater the heat pump still will not engage if the outside temperature is out of operating range.