I have a window that is ~21 - 21.25" which is below the minimum width of the specifications (22"). Thought I might add some information about my experience for people, so as to know what to expect.
The AC unit itself is 19.5" so any window - actual opening - smaller than that will be a no go. You can install this without the curtain panels (side accordions) which are not unit supporting features but rather to keep the air out. However, I wanted to keep the panels to get a good seal and center my AC in the window frame. For this, I had to do a few modifications.
You can cut the accordion/baffles of the panels but both ends of the baffles have unique shapes that "fits" into the unit or frame. Cutting it down to about 1 or two baffles can shave about 0.5" off both ends. I had to do so, then I epoxied the remaining baffle together. Doing this shortens the accordion down to the point where it's difficult to screw the baffle into the AC but can be done with a little fidgeting. Not as cleanly as if you were working with more standard sizes but doable. Also, the plastic frame of the panels has a few pieces that will prevent the panels from pushing in toward the AC to the maximum compression, minimum total width. I had to use a hacksaw to cut some of these pieces off so that the frame can slide in more compactly into the unit. The plastic frame isn't as structurally rigid, but works and since this isn't a major piece that actually supports the weight of the AC, should be okay to go.
With these modifications it's a near perfect fit but there is not much more that can be shaved. The unit is pretty well balanced but it is heavy so installing in a just-fit window makes it hard to work with more than one person. I highly recommend the installation of an AC supporting bracket to prevent this from falling out during installation. I used the top supporting frame and passed through lashing straps that I secured to the radiator to prevent it from accidentally tipping out, slowly letting out slack little by little as I slid the unit into the window frame. This part was easier than I thought it would be, esp with a supporting bracket so I never felt I was in any danger of losing control throughout the process. The hardest part aside from modifying the panels was getting the resting lip on the underside of the unit to lift over the edge of my sill/frame. Once that worked, it settled into the AC window frame L-brackets easily.
So the long story here is it's possible with some modifications and planning to get this thing to fit into a 21-21.25" opening for a perfect fit w/ panels. I don't recommend trying this with anything (window) smaller unless you go panel-less and fill the gaps with something like insulation foam. This is as small (width) as it will get.
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Other reviews have mentioned but I might as well restate. The best selling points are: 1) low noise levels, 2) efficiency, 3) powerful.
The AC unit itself is fantastic. It's so ridiculously quiet I can't hear it over the sound of my computer fan. It cools the room quickly and I can feel air circulating in upper levels of my studio/loft. If you have high ceilings and spend time in high up places, 9500 BTU is a good choice even if your square footage points to something like 6000. My old unit (6000 BTU) was a little under-powered to cool anything but the lower levels of my room. It struggled to get under 80F and on super hot days... I just had to grin and bear it. This unit is a bit more expensive than other units, but the rated efficiency should be factored into the cost calculations. If it works as well as it's supposed to, I estimate I should see my money back after a season or so with better performance to boot.
In these strange times where we're stuck in our homes - might as well make it comfortable. I'm happy that I made this purchase before the season gets super hot and everyone is scrambling to purchase a new AC.
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EDIT: The unit has about 6" depth from INSIDE the window to the furthest point on the front panel. My window sits inside a deep casing, 7" of wall. The unit takes in air from both sides and the bottom so probably best to make sure these intakes are not blocked. With the above modified minimum width, I have about 1-1.5" of head space on all L/R/B sides of the unit. The bottom is more forgiving since the air inlet hole is at a slant so even if it sat flush on the sill it shouldn't get completely blocked. Regardless, this has been plenty enough free space around the AC to provide it with clear air-flow in and operate as expected.
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Product Certification (1)
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From the manufacturer
Energy Efficient
LG window air conditioners with Dual inverter Technology provide up to 15% more energy savings than the ENERGY STAR certification requirement.
Control Your Cool from Anywhere
With the LG ThinQ app, control your air conditioner from anywhere using your smartphone, the Google Assistant or Amazon Alexa..
Energy Saving Value
The DUAL Inverter 10K model is able to save approximately fifteen dollars per year compared to a non-Inverter 8K BTU model.
Dual Inverter Technology
Revolutionary DUAL Inverter Compressor technology moves air efficiently and quietly.
Maximum Usability
User Friendly Panel and Remote Control
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I typically only write reviews for things that I either really believe in or have a uniquely bad experience with—this product lies firmly in the “I really believe in this” category despite some initial troubles which I’ll outline below. This is a long review in a few parts. It’s long because: (1) This product is new, and it does something we’re all familiar with but in a brand-new way, so there’s not a lot of reliable information on it out there; and (2) I really wanted to read something like this when I was shopping for the AC. It’s expensive for most people and the reviews are great but there aren’t a lot of them. It’s hard to find objective reviews these days for whatever reason.Part 1 is because I think that context matters for products like air conditioners. So, if you want, in Part 1, you can find information about my room size, why my apartment may be unique, my experience with a different LG window AC, and how I ended up purchasing this model. If you prefer to skip to the most relevant parts about the Dual Inverter AC, please see the section marked “DUAL INVERTER REVIEW” or the PROS and CONS lists.***BACKGROUND/CONTEXT***Last year was my first year living in an apartment without central AC since I graduated from college 11 years ago. The apartment that I moved into is a small studio on the ground floor, directly above the building’s boiler room. To make matters worse, although it’s newly renovated, it’s still in an old building that relies on steam radiators for heating. The heat is either on or off and there’s no adjusting it. To say it gets hot in my apartment would be a gross understatement. In the winter, temps inside frequently reach the upper 80s. A digital thermometer on my nightstand told me that 87.9° was the indoor high for March. Even when it’s not on in the summer, heat generated from the building’s boilers radiate through the floor. At best, it’s uncomfortable. At worst, it’s borderline unbearable.Jumping back to my first summer, I bought the Wirecutter’s recommended LG window AC (read: NOT this model, a standard one with a normal compressor system) in a size that was slightly bigger than the EnergyStar recommendations for my room size (10,000 BTUs for about 350 sq. feet). That was a big mistake—my apartment simply gets too hot for a unit that size to effectively cool. Moreover, the unit arrived slightly damaged from Amazon, with its interior fan scraping against the casing. Even though I didn’t think it was particularly special, it wasn’t so bad until one day mid-summer, the construction team renovating my building bumped it. The rest of the year, every time it kicked on, the scraping fan against the casing caused massive vibrations in the walls and an annoying clunky sound. I vowed to do a better job next year when I finally removed the unit for winter.I started researching models and returned to the Wirecutter’s site, where they had updated their reviews for 2018 and included a short write up for the Dual Inverter unit. Because it’s too big for most rooms they wouldn’t formally review it against the smaller units they sample in the 7,000 BTU range, but they said pretty great things about it nonetheless. All the reviews for this thing are great, really. Professional reviews and individual ones like this one that you’re reading. Until I got the Dual Inverter, I had resigned myself to believing that there was no such thing as a particularly special window AC.Of course, I ultimately decided on this unit and watched a few websites through early March to see if there would be a sale. When I found one in stock near a store by me, I bought it.***DUAL INVERTER REVIEW***This is a BIG unit. Both in terms of weight and physical size. Unless you are built like Thor and can hold it steady in the window with one hand, you need two people to install it. You should have two people to install it regardless, honestly. And I don’t know if most big units are like this, but you have to actually remove its heavy inside parts (i.e. the “unit”) from the outer shell (i.e. the “cabinet”), to install the bottom and top window sill supports and curtain panel guides.It’s hard to describe, but basically, you’re supposed to move the empty shell cabinet into the window and adjust the supports. You frame up the curtains and you do all that, and last you slide it’s heavy 100 lb components in and screw the cabinet back into that, all while its shell is mounted in the window. I think, at least. We couldn’t figure out how to make that work given space limitations. I can’t picture how it’d work even if I had access to the outside of the building via a ladder or something. The front plate with the electronics is also a separate piece altogether. It’s not at all challenging linking it up to the cabinet, but it is another unique thing about the installation and was a surprise to see during the unboxing.Anyway, the bottom line is that installation of an AC of this size was unfamiliar to my stepfather and I, but after about an hour and a half we got it straightened out and positioned in the window. We turned it on and were happy to hear it running. Unfortunately, about an hour later (and long after he left), I realized it wasn’t quite cooling and a short time after that it clicked itself off with an error message that displayed CH (flash) 62 on the front panel display. I tried everything I could over the next day, but nothing would change the fact that after running for about 30 minutes an error message would pop up. The instruction book says “If you see "CH" in the display, please call 1-800...” So, I called LG and they sent a repairman out about three days later.Apparently, this unit is so new that no one—neither the in-person LG repairman, nor the headquarters tech he spoke with on the phone, nor the initial call center people—really understood what this error code meant or how to fix it. A Google search told me that it historically applies to LG’s line of outdoor central air conditioners when they overheat from sitting in the sun. It was still April in New England, and it had rained all day we installed it, so overheating wasn’t the problem.The LG people identified at least two things wrong: (1) They suspected a broken sensor causing the error message; (2) The unit didn’t cool. I told them I called originally to see if we could fix it while it was in the window. I knew it was a long shot but didn’t want to waste another day of my step fathers time re-installing a new one, especially since it was so hard to do in the first place. I was told they’d have to take it out of the window to fix it and it’s going to be a real pain either way. He told me he was going to order a part but that it wasn't even guaranteed to work. He said my best bet was that I should exchange the unit and install a new one. I thanked him and then he left.So that’s what I did. The next weekend my step-father returned and we removed it from the window (went much faster— took probably about 35 minutes) drove the unit down and exchanged it for another one. With the benefit of having just installed and uninstalled the giant AC, we were able to expedite installation this time around. It still took about 45 minutes (I cannot stress how heavy and big this thing is). The replacement was finally in the window and though neither of us are religious, we said a prayer. Turned it on and it cooled right away. Hallelujah.I’ve waited five weeks to write this and so far have had no trouble with the replacement unit at all. I absolutely love it.***PROS***(1) This model is a monster. It cools my stiflingly hot apartment faster than I even hoped. For example: The first two weeks after we got the new one in, it turned really cool outside. Low 50s, high 40s, which means the heat came back on in my apartment. With all my windows open and fans running, my apartment can cool from 82° down to 78° in an hour against the heat, even when the outside temp is barely at 60°. With the windows closed, this AC running in the back corner and fighting against the heating systems in and below my apartment, this AC can cool the apartment from 82° to 74° in 30 minutes. That never ever happened with the AC I had last year. It’s an absolute game changer for me. This past week saw our first truly hot days, reaching about 90° outside and humid as hell. The heat was off, but the apartment never got above 75°. Last year I never saw that temperature go *below* 74°. It’s fantastic and absolute game-changer for me. Twelve stars out of ten.(2) The remote is awesome. It’s much different than any other window AC model remote I’ve ever seen. Instead of looking like something recycled from models first created around 1989, the remote for this unit has a display and is modern looking. And its signal strength actually amazes me. The AC is in my apartment’s kitchen; a wall separates the kitchen from the bedroom/living room area. The unit is on the other side of the wall from my bed in the far back corner and directly next to the fridge. From my bed, the remote will tell me the temperature it’s set to, the mode it’s on, and the fan speed. The remote can control the unit even though I’m not anywhere near its line of sight. I’m amazed by this, and can’t figure out how it’s possible. It has a typical IR at the top, so I think it’s just a really powerful signal. It’s awesome. I’ve added an important note to the end if you buy this AC and are confused by the remote, since it took me about a week to realize something unintuitive was happening regularly with it.*(3) It really is quiet. Comparatively, it’s probably the quietest AC window AC I’ve ever heard. The first few nights I had it, I kept thinking my microwave was somehow running. I always sleep with white noise going, but it’s so quiet that I have had to turn sound machine off to even figure out if it’s running or not before I fall asleep. It was, and that’s how I discovered my sound machine generates much more white noise than the AC. Of course, advertisements and people who buy expensive things and fool themselves about it may want you to think it’s silent. It isn’t. I wouldn’t even say it’s kind of silent; it still sounds like an AC, especially when it’s on F3 and you are next to it. But when it’s on and running, it’s noticeably different from other ACs. You can hear the compressor automatically adjusting speeds and it’s kind of amazing. You don’t get a kick like a normal window AC when the compressor kicks on. You can hear it subtly speed up and slow down. You truly get a more even temperature, which truly feels more like a central AC than a window AC. I was skeptical about how this would be when I purchased it, but it really holds up: Turning it on, even on F3, will sound virtually silent, since it starts up slowly and ramps up to the power needed to cool at the set temperature. When it’s running, it sounds at about the same dB levels as my microwave running or a nice box fan on medium. No window AC is going to be 100% silent, but for its size I’m amazed by how quiet it is. And it is worlds quieter than the regular, much less powerful LG window AC I had last year. There’s literally no contest in that category.(4) Having WiFi connectivity is really cool. This is the only thing about the AC that might veer closer to ‘Great’ than ‘Outstanding’. It works perfectly fine for me and I’ve never had any issue with it, but it doesn’t surprise me to read other people have had issues. It was easy to set up if you follow their instructions. It’s nice to have, too. And although I wouldn’t particularly care if it didn’t have it, I’ve come to really appreciate it. I think you just have to be patient with it and understand that smart ACs are very, very new. This thing doesn’t have a WiFi receiver like your Roku, or smart TV, or smart lights, where internet connectivity is and supports the device’s primary purpose. Connectivity is secondary at best in window ACs. If you take the internet away, the thing will still cool and do everything else exactly that you want it to do. When you open the app and you’re out and about, it can take 30 seconds or more for your unit to connect at all. Sometimes it times out and you have to reopen the app. And then every change you make, say lowering the temperature from 76° to 72°, is sent as separate signals. A further tedium is if you change it from Energy Saver to Cool via the app, that switch causes the temp down to 60 and the fan to F3 immediately. Since every change requires you to wait for the signal confirmation, raising it back up 72° and F1 can take about 3-4 minutes. It’s tedious. But you know what? It’s also awesome to be able to make my apartment super cool a half hour before I get home from work, and it’s not something I’ve ever had before even with central ACs. And if it takes three minutes to make that happen while I’m on the bus, I’m okay with it. And just for the record: My AC is about 12 feet from my router, separated in the middle by a wall about 6” thick.(5) It’s a really good price for its size. LG was quick, courteous, and helpful with exchanging the first unit I received. The repair man called me a few days ago and was glad to hear I got a new one, since the part he ordered was (of course) back-ordered.***CONS***(1) Installation is difficult, because the unit is BIG. Can’t stress that enough. I don’t understand how some reviewers are complimenting its ease of installation. Maybe they’re familiar with really big units of this size? I wasn’t, my stepfather wasn’t and none of my friends were. I don’t think many people are. You can see the measurements online—it weighs about 100 lbs and you will really need two people to help balance it on a window frame, with the bulk of that weight outside the window. And it’s unusual, in my experience, that you have to take the heavy part out of its case altogether, so you can work with the hollow AC shell during the installation. It’s not even intuitive, so you have to pay attention to the instructions. The first time we installed it took about an hour and a half.(2) The first unit I got was completely busted. I simply view this as one of those things. Some appliances won’t work out of the box. It happens. Unfortunately, I didn’t know it didn’t work until I spent most of an afternoon to installing it. Luckily, LG was wonderful about attempting to fix it and exchanging it for a new one. I will say though, had the second unit not worked either, this review would be much different and I probably wouldn’t have tried a third time.(3) As above, this unit is NEW. It’s a new kind of AC and a new kind of technology. I’m writing this in May 2019–the model has been around for a little more than a year now, but most people, including LG repair people, haven’t heard of it. My apartment gets so hot that I’m OK with being in the pilot program for this. It’s very much worth it to me. That’s why I’m writing a review for an AC in the New England spring-time.(4) Using the WiFi connection/app can be tedious, but it does work for me and I do love it, even if it needs improvement. Per the Wirecutter, it certainly seems like other ACs aren’t flawless in this respect yet, either. So it’s probably as good as it can be until the technology improves.**NOTE FOR PEOPLE WHO BUY THIS AND ARE CONFUSED BY THE REMOTE: If you manually change the temperature on the unit, it won’t affect what is displayed on the remote. But the inverse isn’t true: The remote’s settings will affect the unit and the display. So for example, let’s say you turn on the AC with the remote and it says 72°. The three horizontal bars on the right are all the way at the top, indicating the highest fan speed (F3), on Energy Saver Mode, indicated by the locked “[E]” at the top of the remote display (see pictures). If you go to the unit and manually change it to 76°, put it on the lowest fan setting (F1) and on Cool, the unit will adjust to your inputs, but the remote display will still read 72°, F3, Energy Saver Mode (which it will continue to read as for as long as you don’t touch it). But then, if you push the down arrows on the remote, the display on the unit will jump immediately back down from 76° to 71°, highest fan (F3), and Energy Saver Mode.When you turn on the remote for the first time, it defaults automatically to F3– It took me almost a week to discover that the unit would immediately jump back up to the highest fan setting (F3) every time I would raise or lower the temperature with the remote. Since there is no guide to what the different symbols mean on the remote, I didn’t realize the three bars on the right indicated the highest fan speed. Most are intuitive, but I just didn’t get that until I experimented with it directly. You may get that faster than me. But once you get it, and you set the remote to F1, it’ll stay that way until you change it on the remote. F1 is when you’ll really notice how quiet it is.***FINAL THOUGHTS***I am prone to being too hot and winter is usually my favorite season. I know that makes me unusual, but quality air conditioners and comfortably cool temperatures are extremely important to me. Though it was a bummer at first installing a broken model, I have absolutely zero regrets about purchasing the dual inverter model. I cannot recommend it enough and think it will change the game for window units in the future.
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Reviewed in the United States 🇺🇸 on August 10, 2021
The symptom of the problem was the inability to cool the room, regardless of how low I set the temperature, under conditions which it had easily handled previously. It is a symptom which can easily be mistaken for inadequate capacity. The reason I could confirm the problem is that I have been continuously monitoring its power usage with a kill-a-watt meter. Normally it operates between a low of 150 watts and a high of 1150 watts. On three occasions it refused to operate at more than 300 - 400 watts despite targeting a temperature 10 degrees below room temperature. After unplugging it for a minute it then easily ramped up over 15 minutes to 1050 - 1150 watts and cooled the room down in each case. I do not know the cause of the problem, but I seem to have found a simple cure. If it continues to occur, I will put it on a timer to interrupt its power and reboot it on some frequent basis. I did not wish to let that problem detract from its five star rating for its normally outstanding characteristics, but after three occurrences, I must.
Other operating characteristics seem pretty good. It's output/electric demand is determined by the difference between setpoint and room temperature. In energy saving mode, in my use, it will start when room temperature is about 2 degrees higher than setpoint and will shut off when about one degree below setpoint. Otherwise it quietly varies its output to keep temperature closer to the setpoint, as it will do when not in energy saver mode. I have other ACs that noisily cycle on and off drawing 800 watts or so; I far prefer this when it runs quietly and continuously in the 200-300 watt range when it is 5-10 degrees hotter outside than inside.
You know you have a winner when the box declares that comparable units have operating cost of $115 to $182 per year and this has an estimated $68 yearly cost because it became available after most other units were tested to establish the range.
Just some additional comments on delivery and installation: It arrived on a Fed Ex semi truck. The driver called in advance to find out if my road had room for his oversize entry and exit. The unit had strapping around the box and more straps to secure it to a pallet, which were removed to get it in the door. Turns out that a pallet is essential because the bottom of the box is absent to allow the box to be slipped off upward when the box straps - which were used to carry it - were removed. There was just a thin layer of foam under the AC, but the unit was well protected on sides and top. The potentially breakable plastic front was not mounted to the unit, but separately packed on top with a warning not to stand on the box. I thought it very well packaged, if delivered on the pallet; but very vulnerable without it. My vendor, Sylvane, did a good job of delivery.
All my ACs are through the wall mounted. See the picture of this one mounted at maximum height under the eaves. That was necessary to get its air to exit above the TV that has to share the same wall. It can be a hassle making the hole in siding, but wall mounts are much better weather sealed and less likely to have vibration. Also I never have to remove them seasonally. Despite sub-zero Winter temperatures, I've never had a problem. This unit replaced an undersized unit, so the hole just had to be made larger for me. Mounting the sleeve to wall studs eliminates all weight lifting and positioning problems. When the sleeve is secured, I use an extension ladder, as pictured, sloped up to the sleeve to slide the AC up to sleeve height where one hand can give it the final tilt before sliding it into the sleeve. The ladder is held to any desired height with firring strips clamped together, braced securely and tied to the ladder. It was thus a one man install with nothing heavier than a ladder to lift.
I have no plans to use wi-fi. The remote has nearly full capability; the dirty filter timer can only be reset on the unit, however.
Size: 14000 BTUStyle: 115VVerified Purchase
8/30/21 update: Excellent Machine with Control Glitches
By Bob in NJ on August 10, 2021
After two months of use I have concluded that it is by far the best AC I've ever installed (out of seven). However, it is not flawless - the reason for this review and the downgrade from five stars I first gave it. The single flaw I have noted is that the control system can hang up and cause it to not deliver its full rated output. That problem has happened three times so far and was resolved in each instance by unplugging the unit for a minute and then re-plugging it, letting it "reboot" whatever control system it has.By Bob in NJ on August 10, 2021
The symptom of the problem was the inability to cool the room, regardless of how low I set the temperature, under conditions which it had easily handled previously. It is a symptom which can easily be mistaken for inadequate capacity. The reason I could confirm the problem is that I have been continuously monitoring its power usage with a kill-a-watt meter. Normally it operates between a low of 150 watts and a high of 1150 watts. On three occasions it refused to operate at more than 300 - 400 watts despite targeting a temperature 10 degrees below room temperature. After unplugging it for a minute it then easily ramped up over 15 minutes to 1050 - 1150 watts and cooled the room down in each case. I do not know the cause of the problem, but I seem to have found a simple cure. If it continues to occur, I will put it on a timer to interrupt its power and reboot it on some frequent basis. I did not wish to let that problem detract from its five star rating for its normally outstanding characteristics, but after three occurrences, I must.
Other operating characteristics seem pretty good. It's output/electric demand is determined by the difference between setpoint and room temperature. In energy saving mode, in my use, it will start when room temperature is about 2 degrees higher than setpoint and will shut off when about one degree below setpoint. Otherwise it quietly varies its output to keep temperature closer to the setpoint, as it will do when not in energy saver mode. I have other ACs that noisily cycle on and off drawing 800 watts or so; I far prefer this when it runs quietly and continuously in the 200-300 watt range when it is 5-10 degrees hotter outside than inside.
You know you have a winner when the box declares that comparable units have operating cost of $115 to $182 per year and this has an estimated $68 yearly cost because it became available after most other units were tested to establish the range.
Just some additional comments on delivery and installation: It arrived on a Fed Ex semi truck. The driver called in advance to find out if my road had room for his oversize entry and exit. The unit had strapping around the box and more straps to secure it to a pallet, which were removed to get it in the door. Turns out that a pallet is essential because the bottom of the box is absent to allow the box to be slipped off upward when the box straps - which were used to carry it - were removed. There was just a thin layer of foam under the AC, but the unit was well protected on sides and top. The potentially breakable plastic front was not mounted to the unit, but separately packed on top with a warning not to stand on the box. I thought it very well packaged, if delivered on the pallet; but very vulnerable without it. My vendor, Sylvane, did a good job of delivery.
All my ACs are through the wall mounted. See the picture of this one mounted at maximum height under the eaves. That was necessary to get its air to exit above the TV that has to share the same wall. It can be a hassle making the hole in siding, but wall mounts are much better weather sealed and less likely to have vibration. Also I never have to remove them seasonally. Despite sub-zero Winter temperatures, I've never had a problem. This unit replaced an undersized unit, so the hole just had to be made larger for me. Mounting the sleeve to wall studs eliminates all weight lifting and positioning problems. When the sleeve is secured, I use an extension ladder, as pictured, sloped up to the sleeve to slide the AC up to sleeve height where one hand can give it the final tilt before sliding it into the sleeve. The ladder is held to any desired height with firring strips clamped together, braced securely and tied to the ladder. It was thus a one man install with nothing heavier than a ladder to lift.
I have no plans to use wi-fi. The remote has nearly full capability; the dirty filter timer can only be reset on the unit, however.
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Reviewed in Canada 🇨🇦 on August 19, 2022Size: 14000 BTUStyle: 115VVerified Purchase
