Smallest Window Air Conditioner Units

The smallest window ACs are claimed to be some of the more efficient appliances. This is especially so when compared to those portable AC units.

One of the most practical of cooling units, a smaller window AC can be selected to fit your room perfectly, thus saving a great deal of space in the process.

These units, though smaller in build, offer the most powerful of cooling solutions and work to keep the room they’re placed in at consistent cooler temperatures throughout use.

Best of all, if you can select the most appropriately sized smaller window AC to match your space perfectly, you can further improve on the cooling conditions in that room.

Here we offer no less than six reviews on the very best smallest window ACs on the current market. Considering them for their specifications, we also reference the many benefits and additional features these smaller units boast.

In concluding, we present our expert advice as to selecting the very best smallest window AC for your needs. Therefore, you should be able to purchase that ideal model to suit your individual requirements.

Quick Picks: Smallest Window Air Conditioners Compared

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Haier ESAQ406T
  • EER: 12.2
  • BTU: 6,600
  • Noise Level (dBa): 43

  • Cooling Area: Up to 250 sq. ft.
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    Haier ESAQ406P
    • EER: 11.2
    • BTU: 6,050
    • Noise Level (dBa): 43

  • Cooling Area: Up to 250 sq. ft.
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    LG LW6017R
    • EER: 11.5
    • BTU: 6,000
    • Noise Level (dBa): 52

  • Cooling Area: Up to 260 sq. ft.
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    LG LW8016ER
    • EER: 12.1
    • BTU: 8,000
    • Noise Level (dBa): 55

  • Cooling Area: Up to 340 sq. ft.
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    LG LW1216ER
    • EER: 12.1
    • BTU: 8,000
    • Noise Level (dBa): 52

  • Cooling Area: Up to 550 sq. ft.
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    Koldfront WAC25001W
    • EER: 9.4
    • BTU: 25,000
    • Noise Level (dBa): 64

  • Cooling Area: Up to 1,500 sq. ft.
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    *All links above will take you to the latest prices on Amazon.com or you can read our in-depth small window air conditioner reviews below.

    Why Choose the Smallest Window AC?

    Many people instantly assume larger and more substantial AC units to be the best choice. However, problems occur which such AC unit types when they’re placed in a room that isn’t appropriately designed for them. So, by placing a larger AC unit in a smaller room, the dehumidification process isn’t completed correctly, as the larger AC unit will cool it before it has the chance to do this.

    Thus, a smaller window AC unit can help here:

    • Smaller window AC units are most effective at dehumidifying a room
    • Smaller window AC units are more efficient when operating
    • Reduced units such as these cope better over extended running periods
    • These smaller AC units work to the best dehumidification rate which ensures a more comfortable cooler air and circulation process
    • Those smaller window AC units do not take up unnecessary room/space in the home

    The Models That Have Made Our Best Smallest Window AC List

    By trialing and testing such models on the marketplace, we’ve been able to find out for ourselves those better performing smaller window AC units.

    Best of all, these are the models that not only fit into those smaller of windows, but they’re also lighter in weight. Also, these units are all the easier to install with the minimal amount of work required.

    Thus, we’ve also paid careful consideration to the overall structure and design of each model reviewed. This means that everyone offered here for review is the most practical when it comes to home environments.

    In addition to searching for such individual specifications, we’ve also made a concentrated effort to consider customer reviews when deciding on our top six. Therefore, these smallest window AC units also have some of the very best verified customer reviews.

    Six of the Best Small Window AC Models on the Market

    #1 Frigidaire FFRA0511R1

    • EER: 11.1
    • BTU: 5,000
    • Weight: 41 lbs
    • Cooling Area: Up to 150 sq. ft.

    Top of our list and Editor’s pick of the Best Smallest Window AC is the Frigidaire FFRA0511R1. This is an AC unit which we believe has it all.

    A most simplistic of designs and perhaps one of the easiest to operate, this works fantastically in all smaller spaces. It also has a smaller price tag attached to it!

    Providing cooling relief to areas of up to 150 square feet, this lightweight model is 41 Ibs and has an EER of 11.


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    Highly recommended by the experts also, this is a reduced noise unit, which is most effective. Besides this, the efficiency is highly rated here as the Frigidaire saves you money by conserving energy with a low power start-up process.

    Complete with two cooling speeds, and two fan speeds, the mesh filter is also removable for washing.

    Though the FFRA0511R1 is without the many features you find with other AC units, we believe the sheer power of this model more than makes up for this.

    #2 hOmeLabs Window Air Conditioner

    • EER: 11.1
    • BTU: 5,000
    • Weight: 36 lbs
    • Cooling Area: Up to 150 sq. ft.

    Our second smallest AC unit for window installation is also a most simplistic of models but provides a staggering amount of cooling relief.

    Yet again, another basic construction machine, what the hOmeLabs model lacks in additional features, it makes up for in its performance!

    Providing cooling relief to rooms up to 150 square feet, boasting an EER of 11.1, and weighing just 36 Ibs, this is a best-selling window AC unit that can be used all throughout the year.


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    Ideal for use in small apartments, bedrooms, and RV’s, this model comes with all the items necessary for a quick and straightforward installation process.

    With seven speeds to select from, alongside two cooling and fan settings, this unit also boasts a washable feature – ensuring continuous use.

    Whether you require an ongoing cooling solution or instant relief, this unit has a quick cool option. Therefore you can demand instant results in as little as ten to 15 minutes.

    #3 Frigidaire FFRE0833Q1

    • EER: 11.1
    • BTU: 5,000
    • Weight: 36 lbs
    • Cooling Area: Up to 150 sq. ft.

    Our choice for those medium-sized of rooms, this is yet another Frigidaire choice, but this time the FFRE0833Q1 model.

    Once again covering a room of up to 150 square feet, weighing in at 41 Ibs, and offering an ERR rating of 11.2, this AC unit benefits from an eight-way design function.

    Therefore, comfort is easily controlled, with the ability to change the unit’s air direction, regardless of where the unit is mounted in the room.


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    What’s more, with a clean air ionizer as part of the AC unit’s makeup, allergy sufferers will find instant relief as impurities are removed as much as possible from the immediate environment.

    The FFRE0833Q1 is also less noticeable structurally when it comes to placing outside of the window and offers one of the most straightforward of fits.

    Energy is conserved throughout using the Frigidaire, utilizing a continual low power operation. This model also comes complete with a remote control for increased comfort.

    #4 Haier HWE12XCR

    • EER: 11.1
    • BTU: 5,000
    • Weight: 41 lbs
    • Cooling Area: Up to 150 sq. ft.

    A fantastic smaller window AC for those larger sized of rooms must be the Haier HWE12XCR.

    Catering to areas and offering cooling relief for 550 square feet in total, the Haier does this while still boasting an EER of just 11.3!

    Understandably this is the heavier of AC units weighing 70 Ibs. However, with this increased weight comes an enhanced performance while operating.


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    Another highly recommended industry appliance, the Haier allows a selection of three fan speeds, three cooling speeds and boasts an energy-saving selection mode.

    Featuring a fantastic selection of options, it also ensures ease of use through a digital display, an electronic control panel, and a remote control.

    Considered one of the most easier of appliances to use, this is the more durable of units and requires less maintenance than standard AC units of similar size. In fact, the Haier will tell you when the filter needs cleaning, which, when occasionally required, can be done so at the flip of a button.

    #5 GE AHM05LW

    • EER: 12.2
    • BTU: 5,500
    • Weight: 45 lbs
    • Cooling Area: Up to 200 sq. ft.

    Our wonderful energy star-rated smallest window AC unit reviewed here is the remarkable GE AHM05LW.

    At just 45 Ibs in weight, this is the unit that still has a great EER rating of 12.2 while providing an instant cooling relief to areas up to 200 square feet.

    Best of all, this is the AC unit that you can leave on throughout the night, such is it considered the quietest runner in operation. Therefore, it’s an ideal choice for the bedroom.


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    The GE allows you to program it to start and stop when it’s needed the most. Whether you require it as the main AC unit or even as a backup should your central one fail, this is undeniably an incredible appliance.

    Though only recommended for use in storm windows, this does come with a remote control for ease of use as well as a handy 24-hour timer.

    #6 Keystone Window-Mounted

    • EER: 12.1
    • BTU: 12,000
    • Noise Level (dBa): 52
    • Cooling Area: Up to 550 sq.ft.

    Our final AC unit for review on this list is the wonderfully budget-priced Keystone Window-Mounted model.

    This is a great option for those looking to cool smaller rooms and can relieve areas up to 150 square feet in total.

    Lighter in weight at just 45 Ibs and with an EER of 11.2, this is a small but incredible performer of a window AC unit.


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    Some of the best reviews for the Keystone center around its brilliant additional features. This includes smart programmable options plus an advanced remote control that allows for some great options.

    With an energy saver mode as well as sleep mode to choose from, energy is reduced dramatically via this appliance while cooling temperature is spot-on throughout.

    A super quiet runner, the Keystone allows you to control absolutely everything at just the touch of a button on the accompanying LCD remote control. This ability is astounding, considering the lower cost of the AC unit overall.

    Getting the Best Smallest Window AC Unit for Your Needs

    To ensure that you select the best smallest window AC, there are a few issues to consider before making that final purchasing decision. These include:

    • Getting the right fit – All these window AC units are the smaller options on the market and designed for those smaller windows. Therefore, to benefit from their properties, you’ll need to measure up your designated window and use these measurements when comparing them to the unit you’re interested in.
    • Thinking of those small but ultimately important other factors – As well as the obvious questions, you’ll need to consider other factors here that may impact the type of window AC unit you choose. These include the number of people occupying the room, where the unit is to be installed, and whether the room is exposed to sunlight or not.
    • Considering potential running costs – Though many people believe AC units to be the penultimate in draining their finances, smaller window AC units are relatively inexpensive to run. You can, though, further ensure this by looking out for such things as EER ratings, sleep modes, and timers.
    • Understanding the maintenance required – Smaller AC units will continue to run extremely well, provided you keep them regularly maintained. This doesn’t have to be extensive but can include keeping an eye on their filter, cleaning out the vents, checking for blockages, and inspecting the unit if it’s only used seasonally. The more you can do to take care of your AC unit, the longer it will continue to provide top-notch cooling relief for many years to come.

    Frequently Asked Questions

    Are there any alternatives to those smallest window AC units?

    If you’re not yet able to install a smaller window AC unit, there are two possible alternatives you could consider. These include wall mounted units and those portable AC units. These can both be used in the living environment and offer the optimal cooling options if a window AC unit isn’t a viable choice.

    Do I need to bother with the maintenance on a smaller window AC unit?

    Some people think that a smaller AC unit requires little or no maintenance due to its reduced size. However, though we’ve selected those models that need minimal maintenance, any AC unit, regardless of size, will still need regular upkeep. This is because the more you can do to ensure a clear and good operation, the better your machine will perform. This will also increase its longevity. Maintaining a smaller window AC unit is simple and should take a few minutes each time.

    Our Final Thoughts on the Smallest Window ACs

    In concluding, in our expert opinion, we feel that every one of these smaller window AC units reviewed here can provide effective cooling performance for all consumers. Each one is also a better option when considering an easier DIY window installation choice.

    But, the model that just edges ahead for us is the Frigidaire FFRA0511R1. This is what we consider the perfect example of a fantastically performing AC unit, which though discards of all the frills, is an outstanding cooling appliance – especially when considering its lower than average price tag!

    So, if you’re keen on finding an AC unit that can be installed in the window, all six of these review models here can offer you fantastic cooling respite – all the while doing so at some of the most competitive prices on the current market.