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7 Best Rated Vertical Window Air Conditioners to Cool a Room Quickly

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A ir conditioners can be put on the list of mandatory appliances that you most likely find in the majority of homes worldwide. The perfect ally in fighting torrid days, it can easily lower the inside temperatures and bring you the ideal level of comfort. You must be familiar with the regular units that can be mounted on the wall, but were you aware that there is a type that can be mounted on the window sill, in a vertical position?

Vertical window-mounted ACs are a more reasonably priced and simpler to install version that people prefer when they want a window-addressed unit. They don’t imply so much installation work as through-the-wall ACs and are also more stress-free to move. If this type is what your house needs, have a look at the most convenient and efficient models offered by the most reputable brands.

If you want to chill compact rooms, check out our choice of the smallest window air conditioners that can be successfully installed in tight places.

Top 11 Vertical Window Air Conditioners Comparison

Photo Product Name BTU Area Coverage Fan Speeds Modes Add-ons Price
Keystone KSTSW10AImage
Best Overall
1. Keystone KSTSW10A 10,000 450 sq. ft. 3 and Auto 6 Check Filter, Timer Check Price at Amazon
Frigidaire FFRS1022R1 Image 2. Frigidaire FFRS1022R1 10,000 450 sq. ft. 3 and Auto 6 Filter Reset, Timer Check Price at Amazon
PerfectAire 3PASC10000 Image
Editor’s Choice
3. PerfectAire 3PASC10000 10,000 450 sq. ft. 3 and Auto 6 Check Filter, Timer, Follow Me Check Price at Amazon
Global Industrial 10,000 BTU Image
Best for Allergies
4. Global Industrial 10,000 BTU 10,000 450 sq. ft. 3 and Auto 6 Check Filter, Timer, Follow Me, Auto Restart Check Price at Amazon
Arctic King AKSC08CR61 Image
Best for the Money
5. Arctic King AKSC08CR61 8,000 350 sq. ft. 3 and Auto 4 Auto Restart, Filter Check, Follow Me, Timer Check Price at Amazon
Frigidaire FFRS0822S1 Image 6. Frigidaire FFRS0822S1 8,000 350 sq. ft. 3 and Auto 4 Filter Reset, Timer Check Price at Amazon
Koldfront CAC10000W Image 7. Koldfront CAC10000W 10,000 400-450 sq. ft. 3 and Auto 6 Check Filter, Timer Check Price at Amazon

1. Keystone KSTSW10A

Check Price at Amazon


Specifications

  • Dimension: 26.5”H x 23.3”D x 18.3”W
  • BTU: 10.000
  • Area coverage: 450 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:


This model is a heavy-duty one designed to handle large rooms measuring up to 450 sq. ft. For this, it delivers a power of 10,000 BTUs, so it won’t make an effort nor will it overburden your electrical network. It’s intended to be mounted in casement windows or using a horizontal slider and it will not fit traditional double-hung windows. The overall dimensions are 26.5” high x 23.3” deep x 18.3” wide, so to be installed, it requires the window to measure at least 28” high and 19″ wide. The entire installation kit is included so you won’t experience any trouble while at it.

Full convenience

A good AC is one that can be handled effortlessly, and you will find this one very stress-free. It has a touch control panel so you can easily make your selections and it also comes with a remote control for distance maneuvering. After setting it up, an LED will light up to let you know which mode or fan speed you have chosen.

You can choose between three fan speed stages and 4 directions for the air current so you can have complete control over the inside ambiance. There are 6 operating modes available, including Cool, Dry, or Auto. The Dry mode acts like a dehumidifier that can remove up to 1.1 liters of moisture every hour. While it cools and dehumidifies the air, the device also retains some of the impurities in the air, with the help of the washable filter located on the front side. The machine will even tell you when it’s time to wash the filter, by lighting an LED indicator.

If you want to personalize its functioning, you can use the programmable timer and set it to start and turn off according to your schedule. This way, you will enjoy getting home to a cool ambiance and you will also avoid unnecessary functioning.

Money-saving

The main concern related to installing an AC is that it will bring bigger electricity costs. No need to worry about that with this unit that was packed with several money-saving features. For starters, it is an Energy-Star rated appliance, so it was manufactured using the latest technologies in limiting energy consumption. Next, it even has an energy-saving mode that helps it lower the costs to a minimum, without affecting its efficiency.

Another useful feature in the matter is the Sleep Mode that can be used during the course of the night. This mode raises the temperature every hour or every four hours until it brings it two degrees up, then it will turn off or enter standby until the temperature begins to drop. This way, the unit will remain silent not to disturb your rest, and it will also limit the power usage. The warranty is not very generous, on the other side, only 1 year for the whole unit.

Air conditioners can be mounted in several other places. See which are the finest through the wall air conditioners that can be fitted at any height point on the wall.

PROS

  • Works as a dehumidifier
  • Multiple features to save energy
  • Intuitive operating mode
  • Simple installation
  • Extended area coverage

CONS

  • It’s reportedly noisy
  • Short warranty


Verdict

No doubt about it, this AC is an excellent choice among window models that can be mounted vertically. It gives great results in cooling the air while also reducing energy usage, so it will not become a major consumer in your house. Furthermore, it’s simple to maneuver and it acts as a dehumidifier.



2. Frigidaire FFRS1022R1

Check Price at Amazon


Specifications

  • Dimension: 20.2”H x 14.5”W x 23.5”D
  • BTU: 10,000
  • Area coverage: 450 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:


Specially made for casement or sliding windows, this is your go-to choice if you want a compact but powerful AC that you can mount and set up yourself, due to its fitting kit included in the pack. Additionally, the company that manufactured it offers you a full 1-year on parts and labor warranty and, for another 4 years, a limited version for your on-sealed system.

A perfect choice for windows measuring between 21.5” minimum and 40” maximum in height and at least 15.5” in width, it comes with filler panels for an easier installation. It measures 20.2” in height, 14.5” in width, and 23.5” in depth, giving you a balanced option. It might be a bit large, but its power will make it worth your money.

It outputs 10.000BTUs, being ideal if you want to cool a room up to 450 sq. ft. Besides cooling it down, it will also dehumidify it up to 3.4 pins per hour. Plus, it includes a front-mounted mesh washable filter that captures dust and other impurities from the air. At whatever time the filter needs a cleanup, the light on the control panel will announce you. The air current can be sent to 4 directions and the fan has 3 speed intensities to give you full customization options. Plus it offers maximum versatility with the full-function remote control and 24-hour timer.

Using a standard 115V electrical outlet, it provides an energy efficiency ratio of 10.4. One of the features that keep the temperature and energy in balance is its Sleep Mode, specifically intended to conserve energy, and thus keep your energy bills from rising. For added energy-saving results, it also comes with a specific mode that limits the impact on your bill. To protect your investment, Frigidaire warrants its product for 2 years on parts and labor, while the sealed system inside it is protected for 3 to 5 years.

PROS

  • Operated by remote
  • Simple mounting process
  • Wide room coverage
  • Pairs as a dehumidifier

CONS

  • Some complained about the small size of the display
  • There were some complaints about the noise being loud


Verdict

Offering you several functions and full customization, you can either use its already selected options to set your desired temperature or customize its functioning. Thanks to its timer, you don’t have to keep tabs on it all the time, as it will stick to your settings.



3. PerfectAire 3PASC10000

Check Price at Amazon


Specifications

  • Dimension: 14.5”W x 20.5”H x 23.5”D
  • BTU: 10,000
  • Area coverage: 450 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:


Measuring 14.5” in width, 20.5” in height, and 23.5” in-depth, this AC unit works best with casement, crank, or horizontal sliding windows. Equipped with an expandable window mounting kit, it can be mounted on windows measuring between 15 to 16” in width and 21 to 39” in height. Front-mounted, you will easily have access to its filter for a more hassle-free regular cleaning.

With 10.000 BTUs it can fully cover a 400 up to 450 ft. sq. room, as its 3 fan speeds will give you full control in each mode. Plus, it comes with a full-function remote control, thus it offers the freedom to control it from a distance. The remote pairs as a thermostat that lets it sense the temperature and customize the operating mode accordingly.
What’s more, it has a hefty control panel, ensuring easy use if you want to set it up manually, or if the remote is not around.

Although it is not Energy Star rated, it doesn’t consume much, while it provides you with silent operation. With only 56 dB on the lowest and 62 dB when using the top speed, you will manage to soundly sleep even with it working at full capacity. Furthermore, PerfectAire will cover all defects in workmanship and internal parts for 1 year after your purchase.

PROS

  • Three fan speeds with full-range air direction
  • Remote control with thermostat function
  • Included expandable window mounting kit
  • Ideal for generous-sized areas
  • Silent operation

CONS

  • Some complained about it being hard to mount
  • There were some complaints about the range of the remote


Verdict

Giving you total control over how it operates, thanks to its thermostat-like remote, it also comes with an expandable window mounting kit, for quick and easy setup. It has a silent operation, so it won’t bother you even if you leave it on while sleeping.



4. Global Industrial 10,000 BTU

Check Price at Amazon


Specifications

  • Dimension: 20 7/8”H x 23.5”D x 14.5”W
  • BTU: 10,000
  • Area coverage: 450 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:
  • Auto Restart:
  • Follow Me:


Another highly-efficient window-mounting vertical AC is this one designed by Global Industrial. The 10,000 BTUs it boasts enable it to cool rooms measuring up to 450 sq. ft. The overall unit measures 20 7/8” high, 23.5” deep, and 14.5” wide, so the window size requirements are between 15.5 to 16.4” wide and 23 to 39-7/16” high. Although it’s not an energy star rated model, the energy efficiency rating reaches 10.4, so it will not overexert your electrical network. Not to mention it is fitted with an Energy Saving working mode. It comes with a complete mounting kit so you will have to invest in any other components.

The fan can be set to one of the three levels available, each providing certain cool air intensity. At the top speed, it can deliver 550 cubic feet of air per minute, at the medium level the CFM is 500 while at the lowest, it is 450. As for operating modes, it is fitted with an Auto, a Cool, and a Fan Only. Plus, it also acts as a dehumidifier able to remove 2.3 pints of humidity per hour, and it can be set to the Sleep Mode during the night, to save energy. The average noise level is 59 dB so you might want to set it to the lowest speed while you sleep. We must mention the Auto Restart setting that immediately turns it back on after a power shortage, memorizing the pre-selected settings.

Additionally, the remote can fully operate as a portable thermostat thanks to its Follow Me function, giving you straightforward and quick information regarding the temperature. For extended peace of mind after purchasing it, you will benefit from a warranty of 1 year for parts and labor, while the sealed system is warranted for 5 years.

PROS

  • Generous warranty
  • Very efficient as a dehumidifier
  • Automatic restart function
  • Thermostat-like remote

CONS

  • It’s not the quietest alternative
  • The timer is not very accurate


Verdict

Nonetheless, this is an exceptional alternative if you want to spend your money a good quality AC unit. It is packed with energy-saving features so it will help you save money and it’s very simple to maneuver. It is strong enough to handle medium-sized rooms.



5. Arctic King AKSC08CR61

Check Price at Amazon


Specifications

  • Dimension: 24”D x 15”W x 21”H
  • BTU: 8,000
  • Area coverage: 350 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:
  • Auto Restart:
  • Follow Me:


While not as powerful as the previous models, this one does manage to cool areas up to 350 sq. ft., being perfect for office buildings, bedrooms, or even small living rooms. It measures 24” deep x 15” wide x 21” high and it requires to be mounted on a window that measures at least 15.5” wide and 21.3” high. Rest assured, as all the necessary hardware and components so you can have it installed right away.

The good news is that it’s Energy Star rated, so it will considerably reduce your electricity expenses. Its EER reaches 10.1 and up. Even more, if you mention all the economical features it includes, namely the Sleep Mode for smart night functioning, or the Energy Saver that limits the power usage. It also runs quietly, with a noise level fluctuating from 50 to 60 dB, depending on the level you select. This brings into discussion the 3 speed stages available and the 4-way air direction control. Choose the intensity that suits your needs either by touching the control panel or by using the included remote. Moreover, the remote acts like a thermostat thanks to the Follow Me button that lets you make the correct settings based on the ambient temperature.

The list of useful features continues with the Automatic Restart that turns it back on after a power shortage, ensuring it will restart with the same settings as before the shortage. You will also enjoy the handiness of a timer that can be set at any time during the 24 hours. The AC pairs as a dehumidifier and a purifier thanks to the Dry mode and the included filter that can be washed. It will even tell you when you should wash the filter by lighting an indicator on the interface.

PROS

  • Air cleaning and dehumidifying abilities
  • Convenient thermostat remote
  • Silent operating
  • Good price-quality ratio
  • Automatic restart

CONS

  • Smaller area coverage
  • The remote doesn’t have a large range


Verdict

If you are on a budget, this AC can be your best pick that will bring plenty of benefits without sacrificing quality. It is packed with many helpful features and it very easy to mount and set up, so you will find it user-friendly. Although it is intended for smaller areas, it will remain efficient.



6. Frigidaire FFRS0822S1

Check Price at Amazon


Specifications

  • Dimension: 2.4”H x 14 1/5”W x 23.5”D
  • BTU: 8,000
  • Area coverage: 350 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:


Measuring 20 and 1⁄4 inches in height, 14 and 1/5 inches in width, and 23 and 1⁄2 inches in-depth, it is recommended to be mounted on casement or sliding windows, and not with standard ones.
If you prefer having it placed through a wall, you have to make sure the wall is not thicker than 8 and 1⁄2 inches, for a successful installation.

As it offers 8.000 BTUs, you can be sure it can handle to cool any 350 ft. sq. rooms, offering you cold and fresh breathing air. To complete the air-cleaning picture, a washable filter was added so it will manage to retain some of the impurities found in the air. To guarantee the filter will operate within the perfect parameters, a Check Filter light turns on to announce you it’s time to clean it. The filter easily slides out from the grid on the front and you can simply give it a rinse under a stream of water.

Additionally, it comes with ready-select electronic keys that allow you to simply and quickly select your desired temperature. Giving you total command even from a distance with its remote, you can control the airflow as you wish due to its multi-speed fan and the 4-way air control direction for more flexible and personalized use. For added convenience, you will find a Sleep mode for night use, an energy-saving mode, and a programmable timer. Furthermore, the manufacturer offers you a 3 to 5 years warranty for the sealed system and an additional 2-year for parts and labor, after you purchase it.

PROS

  • Stress-free mounting and operating
  • Comes with an adjustable panel
  • Affordable price
  • Easy filter upkeep

CONS

  • Not for standard-type windows
  • Doesn’t remove air humidity


Verdict

It is quick and efficient, while the adjustable panel it comes with will help you secure it to your window. A great device that will make your house even more hospitable and comfortable for your family and yourself. Unfortunately, it doesn’t have a dehumidifying function.



7. Koldfront CAC10000W

Check Price at Amazon


Specifications

  • Dimension: 23.5”H x 14.5”W x 20.87”D
  • BTU: 10,000
  • Area coverage: 450 sq. ft.
  • Dehumidifier function:
  • Timer:
  • Sleep Mode:
  • Energy Saver:
  • Air Filter:


A powerful AC unit is also helpful, and so is this Koldfront model built to handle large areas measuring 450 sq. ft. using its 10,000 BTU power. You can basically install it anywhere you want, as long as you follow the dimensions. It measures 23.5 x 14.5 x 20.87 inches and it fits windows from 15-1/2″ to 16-1/4″ wide with a minimum height of 20-5/16″. Take note that it can only be fitted on casement windows that slide-open sideways or swing out to one side.

It manages to remain a cost-friendly appliance thanks to a series of smart operating modes, starting with the Sleep mode that increases the temperature progressively before turning down to save power. Next, you will find the Energy Saver mode that turns the fan on for 2 to 19 minutes then turns the compressor off, and the timer that allows you to set a working schedule. You will find it very simple to maneuver, due to the large control panel and the helpful remote control that has a 16’ range.

Aside from chilling the air, it will also reduce the humidity level and will retain some impurities as it is packed with a Dry mode and a washable filter. Among all these good sides, a huge downside is the lack of warranty from the producer.

PROS

  • Pairs as a dehumidifier
  • Power-saving features
  • Wide remote range

CONS

  • Lack of warranty
  • The fan is somehow loud


Verdict

All in all, this window vertical AC is a good choice because it has an extended power and area coverage. It operates at low costs and is very user-friendly, but it doesn’t offer any warranty, which can be considered a downside, especially given the acquisition price.



Reasons to Use a Window AC


Coming with several benefits to them and with enhanced living conditions, owning an AC has become a common household occurrence. If you haven’t installed one yet, you might believe that you don’t necessarily need one, but once you discover their convenience, you will be convinced that your house can no longer go on without getting a window AC unit. With stress-free mounting and handling, able to switch its place wherever you need it most in your house, a window air conditioner is a perfect device if you want to save up money, space, and resources.

  • Cost-efficient –think about what type of house you have. Do you have a big, spacious house that requires a central unit? Do you need to cool a single room or the whole house? Depending on what your choices and desires are, there are two types of AC units: a central one, which has more power and cools several rooms; and a window air conditioner that tends to be more appropriate for smaller spaces.
  • Stress-free mounting –window types are simpler to install than their counterparts, the central units. The process might differ slightly depending on the model, but the principle remains the same. However, choose the mounting place wisely because the chosen window will become fixed and will lose its original purpose.
  • Compact and convenient –it does not take up space floor, nor does it occupy a lot of room. Designed to fit into varying window sizes, it can be moved throughout the house wherever you need it most. Working both with cold and hot temperatures, it is adaptable to any type of weather condition, be it winter or summer.

Installation Steps for a Window-Mounting Unit


Window ACs are not only budget-friendly, in most cases, but they also help you achieve a thermic comfort, which, otherwise, you might not be able to reach, especially on hot summer days. Depending on where you wish to mount your unit, you have to take into account the size of the room and for how long you’re planning on using it every day. Installing it on your own might sound a bit difficult to do, especially if you haven’t tackled such a task before. However, if you follow certain steps and have the right tools, it is not that hard.

  • Step 1. Measurements – Make sure you do all the necessary measurements beforehand. If you’ve picked the right amount of BTUs for your room, now you have to make sure your window is large enough for the AC. Most units come with additional, adaptable panels; to help you better fit it to your window.
  • Step 2. Check your window frame – Before you install the AC, make sure your window frames are in good state. Deteriorated frames might affect the appliance, in the long run, so make sure to take care of them first.
  • Step 3. Support brackets and panels – Use the accessories it comes with. Place the brackets below the widow and screw them to secure them. Then, lift the AC and secure it onto the brackets. Adjust the panels according to your window, making sure it is a tight fit, to prevent it from moving.
  • Step 4. Weather-proof – Take a roll of weather stripping and apply it to the edges of the window. This way, as soon as you close the window, there will be an air-tight seal, which will keep the elements outside your room.
  • (Optional) Step 5. Lock – Depending on where your window is located, you might want to put a lock, to prevent others from breaking it.

A correctly installed AC unit will help you achieve the optimum temperature for your house while keeping the elements away. Check the brackets and the sealing every now and then, though, to ensure your unit is still in top shape.


Frequently Asked Questions



Can you mount an air conditioner in a window frame?
Not any type of AC can be mounted inside a window. It must have a mounting kit that permits sliding installation. Vertical types can be installed vertically but you can also find horizontal window ACs.

Can a vertical AC be mounted on a wall?
Yes, but you will have to build a frame for it, as you won’t find matching sleeves. Add to that the caulking and repairs involved, and you will have a cumbersome chore.

How do you vent a window AC without an actual window?
In this situation, you have the option to vent it through the door, through the wall, through the ceiling, or using another vent available, like the dryer vent.

Do window ACs pull air from the exterior?
No, these units use a refrigerant that passes through a series of cooling coils before reaching into your room and eventually cooling the air. The refrigerant is blown into the room using a fan.

Do window AC units include filters?
Yes, all of our selected models come with a filter placed on the front, right under the control panel.

What happens if you don't put a window AC in the window?
An upright window AC will not function unless you place it somewhere where it will have access to the outdoor. It must be mounted in a window or another penetration in the wall so that the rear part will communicate with the exterior.

Can I put the air conditioning unit in a sliding window?
The answer is yes, you can mount it in a sliding window, whether it slides from side to side or from up to down.

What is a vertical or an upright air conditioner?
As the name suggests, these units are air-cooling devices intended to be installed in an upright position. Most units can be placed inside a window sill, but some models include a wall sleeve for wall installation.

Can I run my window AC all day?
There shouldn’t be a problem with you having it on 24/7. Most manufacturers state that continuous operating doesn’t pose a risk and will not overheat the unit. No inside part will get too hot or melt or catch on fire if you don’t turn the AC off for so many hours.

What is the average life of a window air conditioner?
In general, the lifespan is 8 to 10 years, or more, as long as it is handled correctly and proper upkeep is being performed.



Conclusion

Having a means of chilling your home is essential, especially in summer when the temperature rises. However, if you don’t want to purchase a location set AC, a window-placed one will provide you with enough cooling power as well as the possibility of moving it in any room you want. While all of the above-mentioned models will be able to create a perfect home environment for you, some might work better with different types of rooms. So, let’s review them once again to make sure you’ve picked the one best fitted for your house.

Best Overall: Keystone KSTSW10A

To put it short, this model is the best yielding out there, when it comes to upright window-mounted ACs. It’s very powerful, boasting a 10,000 BTU cooling ability, and it can cover larger rooms, even larger than those stated by the manufacturer. Therefore, it can successfully turn into your central home cooling unit. It also acts as a dehumidifier so it will raise the level of comfort in your house. It’s pretty simple to maneuver and it doesn’t involve much upkeep rather than washing the front filter.

Our Choice: PerfectAire 3PASC10000

Powerful, packing 10.000BTUs, it can cool down a room up to 450 sq. ft., therefore it is perfect for large rooms like living-rooms or studies. Energy Star certified, and equipped with an energy mode, it won’t raise your monthly bill costs, therefore you don’t have to worry about leaving it on for longer periods. Eco-friendly, as well, it provides you with increased setting versatility, allowing you to choose how fast you want the unit to cool your room. Additionally, it can dehumidify the air, while everything is backed by a 1-year warranty.

Best Vertical Window Air Conditioner for Allergies: Global Industrial 10,000 BTU

Not only will this unit dehumidify the air, thus decreasing the possibility of bacteria and airborne particles to affect your health, but it also includes an anti-microbial mesh filter. Washable, so you don’t need to worry about changing it, the filter will ensure you won’t be bothered by dust, pollen, or other allergens, making the AC especially useful if you suffer from allergies. It features a 3-speed fan and 4 ways to redirect the air, so you can decide which way the air current will head.

Best Vertical Window Air Conditioner for the Money: Arctic King WWK05CM91N

While it’s intended for smaller areas, this AC unit does a tremendous job cooling the air while providing some extra features. It’s very powerful, at 2,344 watts, meaning it will successfully send a draft of cold air into your house. You will enjoy the handiness of a remote control that lets you effortlessly make your selections from a distance and it can be fully adapted to your preferences, as it has 3 fan levels and an Auto setting. Thanks to the Follow Me mode, your remote will work as a thermostat that will sense the temperature in the room and set the AC to function based on it. Therefore, no matter how you decide to set it, it will bring the indoor temperature to the most comfortable level.

Markus Mackay
Markus Mackay
Our resident expert in all things AC-related, Markus is a never-ending source of knowledge regarding how these systems work. What makes him so savvy in this field is his direct experience that he acquired while working in sales. The connections he made during that period also came in handy here as Markus knows a lot of experts in this field. With each article uploaded, he makes sure to gather the expertise of his more experienced ex-peers as well, making sure to provide readers with reliable reviews and articles.